Great concept! Very strong!
The sound effects are so right for the vibe of the game, very, very in theme!
If I can suggest an area for improvement, it would be on the map itself, since it always looks the same; you don't feel like you are really moving or going anywhere. Having a precise visual point to have a distinction could be nice! (Like an NPC at some point, a different color of stage ect..)
Congrats on your first game!