for your first game, this is very impressive.
the first time i tried to participate in the gamejam, a year ago, i didn't end up uploading anything!
that being said, now to the honest review:
+ your game has a nice hint rat character, he's very cool
+ your game actually works, that's great!
+ your game has music
+your game has decent art
- you forgot to set the textures of the tilemap to pixelart mode (turn off bilinear interpolation)
- it's not very interactive, there's not much feedback to what you're doing, which includes the lack of sound effects
- i believe you forgot to increase the health texture's length when you heal, at least that's what i think happens, because i kept being alive even when the red bar was depleted completely
- imo the player doesn't have many meaningful choices to make, when you have something out of control like the dice roll, you'll need to give it a counterpart that you have strong control over. i would suggest doing that by first rolling the die, and then allowing the player to choose what action he wants to perform with it.