Use arrow keys or WASD to move. Complete the objectives and get to the open door. Enemies have one health; click to shoot; use mouse to aim. Collecting a key gets you 1 ammo. Click the green flag twice. Only one level so far; experimenting with making more
Thanks to griffpatch for his amazing scrolling engine (and amazingness in general) graphics from www.kenney.nl; go there; it's awesome also CODE599-Test's Kenney Platformer is awesome: https://scratch.mit.edu/projects/104297197/