Thanks so much! Regarding the controls, the in-game text box distinguishes between PC and Gamepad controls. Additionally, the controls are also laid out in the description.
As for the length, I'm glad you'd like more! We were pretty crunched for time, naturally lol, so the puzzles we did make were mostly thought up on the spot and implemented the moment we could. I'd love to have done more with the potential puzzles but my brain was running pretty foggy from lack of sleep. I'm happy what we did manage to come up with was enjoyable enough at least!
And true, Renko does suffer from lack of invul upon respawn... I completely forgot about getting that implemented, though I felt there's only really one room that could occur and even then, the bullet pattern is slow enough to get to safety.