Written by Airem
Table of Contents:
1. Screenshots
2. Installing on Windows Pc
3. Installing on Linux
4. System Requirements
5. Game features
6. Reviews
This guide describes how to use Steam Proton to play and run Windows games on your Linux computer. Some games may not work or may break because Steam Proton is still at a very early stage.
1. Activating Steam Proton for Linux:
Proton is integrated into the Steam Client with "Steam Play." To activate proton, go into your steam client and click on Steam in the upper right corner. Then click on settings to open a new window. From here, click on the Steam Play button at the bottom of the panel. Click "Enable Steam Play for Supported Titles."
Alternatively: Go to Steam > Settings > Steam Play and turn on the "Enable Steam Play for Supported Titles" option.
Valve has tested and fixed some Steam titles and you will now be able to play most of them. However, if you want to go further and play titles that even Valve hasn't tested, toggle the "Enable Steam Play for all titles" option.
2. Choose a version
You should use the Steam Proton version recommended by Steam: 3.7-8. This is the most stable version of Steam Proton at the moment.
3. Restart your Steam
After you have successfully activated Steam Proton, click "OK" and Steam will ask you to restart it for the changes to take effect. Restart it. Your computer will now play all of steam's whitelisted games seamlessly.
4. Launch Stardew Valley on Linux:
Before you can use Steam Proton, you must first download the Stardew Valley Windows game from Steam. When you download Stardew Valley for the first time, you will notice that the download size is slightly larger than the size of the game.
This happens because Steam will download your chosen Steam Proton version with this game as well. After the download is complete, simply click the "Play" button.
One-button bullet-heaven where a single shot mutates into neon chaos. Imagine Flappy Bird colliding with Vampire Survivors. Full version adds online leaderboards, challenges and unlockable gear.

THE KULKA is a one-button bullet-heaven arcade roguelite where your single shot slowly mutates into pure neon chaos. Imagine Flappy Bird colliding with Vampire Survivors.
Tap to flap like in a classic flappy game, dodge walls of enemies and stack bullet upgrades until the screen explodes in colour.
Fast, focused and replayable – built for tight controls, punchy sound, online leaderboards, challenges and that “one more run” feeling.
Tap or click to flap and keep your orb in the air.
Your shot fires automatically – destroy enemies to earn XP gems.
Level up and choose an upgrade to mutate your bullet.
Survive as long as you can, then try to beat your high score – locally or on global leaderboards.
At first it’s just you, one bullet and a handful of enemies. A few levels later the screen is full of bouncing, splitting, homing, exploding shots – and you’re trying to squeeze through the chaos with a single button.
One-button gameplay – easy to pick up, hard to master. You only control vertical movement, but every flap matters.
Bullet mutation system – every level-up adds new behaviour to your shot: split, ricochet, pierce, homing, explosions, lightning, lasers, novas and more.
Tons of builds – turn your tiny pellet into a bouncing storm, a piercing rail, a safe shield bubble or a swirling vortex of damage.
Fast arcade runs – instant restarts and quick runs; perfect for short sessions or long “just one more try” evenings.
Difficulty options – Relax, Easy, Normal and Hardcore presets – from chill flapping to sweaty record chasing.
Two upgrade styles – classic manual upgrade picks (you choose like in Vampire Survivors) or Flow mode with automatic upgrade choices so you can focus purely on dodging.
Extra modes – additional ways to play.
Neon Geometry Wars–style look – clean synthwave grid, bright orbs and clear hit feedback even when the screen is packed.
Punchy sound design – crisp hits, juicy pickups and satisfying upgrade feedback on both speakers and headphones.
Flexible controls – keyboard (Space + arrow keys), full gamepad support (Xbox / PlayStation / standard) and touch input; great for PC, Steam Deck and Remote Play.
Online leaderboards – compete with other players in global Steam score tables across multiple modes and difficulty levels.
Challenges & progression – unlock new options by completing in-game objectives instead of grinding endless gold.
Ball Bank – choose your starting weapons, skins and modifiers in a dedicated loadout / armoury screen before each run.
Marquee in the main menu – see the top players’ nicknames scrolling across the main menu every time you launch the game.
Steam achievements & Cloud – over 100 achievements plus Steam Cloud support for your progress.
Start small, then let the chaos grow:
Begin with a single bullet.
Pick Split Shot – now you fire two bullets.
Add Ricochet and Pierce – your shots bounce, pass through enemies and cover huge parts of the screen.
Combine Homing, Explosive Bullets, Chain Lightning or Nova Blast to create your own broken combo.
Example mixes:
Faster Shots + Multishot + Faster Bullets = Bullet Spam
Multishot + Area Size + Bigger Projectiles = Wide Wall
Multishot + Pierce = Line Killer
Multishot + Ricochet = Bouncing Storm
Shield + Time Warp = Slow Bubble
Shield + Orbital Drone = Safe Core
Freeze + Vortex = Frozen Vortex
Poison + Vortex = Poison Zone
THE KULKA is all about making this one run as wild as possible – a quick neon arcade fix when you just want to flap, mutate and survive a little bit longer, with enough progression and competition to keep you coming back.
In the full version of THE KULKA, you unlock additional cosmetic skins and visual variants (e.g. Christmas and New Year themes) that change the look of the game – with no impact on balance, mechanics, or leaderboards.
All skins are earned through challenges and objectives – no currency, no microtransaction grind.
Purely cosmetic. Zero advantage, just style.
