As a game jam project, this is incredible.
I will now do my duty as a funny player of games
"TRY THE M KEY, EVERYONE!"
hehehe
Suggestions for improvement:
- Make the player dig treasure in the tutorial, it took a couple dives for me or my friend to figure out that it wasn't a visual effect
- Crabs get stuck in walls sometimes
- Implement stacking effects for the relic items so that having multiple makes you more powerful
- Make the quotas scale slightly faster to encourage players to explore deeper a little sooner
- Make that M button its own mode in a full release--like a zen mode for chilling out and practicing. My time using it was very fun. (P.S. your quota check does not check for negative numbers and I was able to live on indefinitely, since you can press M in town!)