The time crystal mechanic is really cool, I would have loved to see a shop as well so it’s really pushing risk/reward (though I’m not sure what you’d buy at the shop, maybe just sell the crystals for fuel? Typical me, over-complicating a game jam). I really appreciated the multiple speeds for rewinding, it would have been really annoying dying on some of those long corridors then having to go through it at one speed in reverse.