- Different sized wheels?
- Tracks, like tanks have?
- A ”drill” of sorts you could activate once or twice per level to make targeted rock small?
- Maybe the colony had air defenses malfunction and their drones are hostile to anyone so you sometimes need a turret or two to shoot the drones down?
- Strong magnet or bolts to strengthen a join
- Turbo charged engine to have a speed boost which you could activate
- A linear piston which you could use to lift the vehicle a bit
Other stuff
More shapes to travel through?
Instead of just a pile of rocks to go through, add a canyon?
Was there ability to rotate the pieces? I felt the need for 45 degree angle pieces?