Looks really nice and has potential.
Unfortunatly it is also borderline un-playable and I tried a couple of times.
- Fell of the ship multiple times at different locations. First is right at start position, move backward and you are gone. There are a couple of other places, I think the place where the small space ship is shown on the left too.
- The zombies/space mutants get stuck in a T-Pose and sink into the ground once you hit em.
- The debug markers and debug infos are funny to watch but not intended, I guess.
- The zone with the moving energy balls and the laser cannon feels very unfair or I miss something obvious.
- Also got stuck multiple times after getting "off-grid".
Just a tip, do not use the physic engine to perform movement and movement collision detection. It comes with a heap of problems when used for a grid based crawler. It is way more reliable and faster to have a 2d arrary of "tiles" and use that instead. You can then just convert the 2d tile position into a 3d vector (multiplied by the tilesize) and you will never get "off grid", solving a lot of problems seen in your game.