Really enjoyed this, congratulations for achieving this in the time available. The game controlled really fluidly and I enjoyed the character controller and hover/flight mechanics. The sandbox find the crystal gameplay was refreshing and relaxing, and when combined with the on-foot and flight systems the level acquired a sense of scale and verticality that gave a new dimension to the level. Exploration vibes are on point and I think there's heaps of potential for unique level design.
I also really loved the mech design. I do love me some low-poly simple material characters and I think your mech is my favourite out of the jam. Design is awesome, and the animations are really convincing and smooth.
If I had one critical point it might be that while the camera is super dynamic and exciting, the smoothing/acceleration made it a little difficult to aim accurately, so perhaps it could be toned down to give the player better control while in aiming mode.
Awesome game!