A pretty simple and short game.
The art style is clean and neat.
The gameplay is pretty fun. Seeing the dynamites explode and destroy those rocks is satisfying.
I think it would be a good idea to have a counter that tells how many dynamites you currently have.
I also think the game should have an ending. Maybe either destroy all rocks in one go, or max out all upgrades.
The transition between the shop and gameplay is really nice.
The visual effects for the explosion could use more work though. Maybe add some explosion animation, or some fire effect, or even some smoke particles.
The sound effects are pretty good though. I think the explosion sound is powerful enough, but not too loud to the point where it becomes an annoyance. The sound for collection gold is also pretty satisfying to hear.
Though the BGM doesn't feel like it belong here. I'm not sure myself. It feels boring, I guess? The current music, in my opinion, fits more into an adventure game rather than these type of game. Though unfortunately I don't have any suggestion for the replacement.