Started the development a few days ago with an idea which is too complex to finish everything. Multiple playable characters with abilities, (Like Cheems the Bonk Master), Boss Levels, Guns with effects (Like Freeze Ray/Laser). Unfortunately, I'm really needed at work. And I'm forced to only implement like 25% of the original plan. Anyway, I'll try to upload the sauce code and assets and other stuff, when I have the time. Stuff I used: Game Maker Studio (1.4), Inkscape, BFXzr, PxTone and characters from https://dogelore.fandom.com/wiki/Characters.
Hope you guys have fun with my prototype! :D