This has some potential to be a quick little arcade style game. The art, UI and lighting were great. I played quite a few times trying different strategies to mine the most blocks.
I did have one fairly major frustration, I think you should not be able to mine blocks 2 in front of you. I got caught out a lot clicking a little bit too far ahead and skipping the block in front of me. If it just mined the block next to you in the direction of your pointer, I think it would improve the game a lot.
Otherwise, this is a fun little entry to the jam, well done!