I hate to be the one to point this out, but I found a bug in version 1.0!
In level 2-5, you can dig down while you're on the rocky area. The "X" icon appears over the mech but you dig down anyway and can potentially wind up over the bottomless pit unable to dig back up. Or, if you do it in the right place, you can completely trivialize the puzzle -- I got a score of 23 on this level, lmao.
This level also has a bug where if you press B while out of the mech, the "I'll need to use the mech to dig down" message appears, but then you dig down anyway, possibly appearing nowhere near the mech depending on where you were standing.
Congrats on version 1.0, though! I'm having a fun time playing it.