I enjoyed your game, I think it's the first tower-defense one I've played for this game jam. The art, music and sound effects went really well together and the game felt nice and polished, with only a few small issues I could see.
- Slimes moved VERY fast I think in the first or second level which was really weird, and at first I thought the health bar was for the player getting too close to the slime and not from the slimes escaping.
- I don't think you can hammer above or below the player, only to the left and right.
- The tower appears above the player if the player sounds in front of it.
It's amazing you managed to make this all on your own in a week though! Really great job :D!