I like the combination of digging and time reversal in your puzzle game a lot.
With a bit of polish, this could become a very fun little game =)
Some issues you might want to fix:
- Holding a key down will trigger many delayed actions making it difficult to play
- In one of the latter levels, the final door is constantly and rapidly opening/closing
- You can dig through the bottom of the screen ... well, you're a mole =)
- You can only climb a ladder when facing right
Congratulations on your game jam submission!