Really impressive for 6 total hours of work - definitely some quirks to the movement/shooting as you mention in the description, but overall pretty cool little game. There's some cool mechanics such as the gravity ladder thing. If you had told me this was a lost DOS game I'd never played before I'd be convinced, it reminds me a lot of that era aesthetically. With some extra polish to the movement and some expanded mechanics/levels/etc this could be a solid retro throwback game.