This is very impressive for a jam, making a game in C is already impresive for me, I've always used an engine, but doing it from scratch? That's another level. The art is really great, and the level design is very fun, the cover art is also quite good, like one of those retro games from early 90s. I think the controls are a bit too slippery which makes controlling the ship for specially cramped places very difficult, and restarting the level every time is also a bit punishing, especially when the levels are long enough. Those two things are the only things I didn't like, but over all it was a nice experience, especially navigating the levels avoiding the walls, it was very fun.