Thanks for the comment!
This game is just a prototype and our team didn't have the enough time to create our ideas in time during the game jam, but I'll just give a brief overview about the game's plot.
We wanted to make Foxie travel through two dimensions, white world (the normal map) and the red world (where the enemies are stronger, faster and more annoying). The percentage below Foxie was supposed to be the limit of the fox's stamina (like when you attack or walk), and when you attack the enemies it will increase. But when it reaches 0% the world will turn more red and difficult overtime, and you gotta survive as long as possible until the world turns normal again. (The bats are super bats, they're poisonous and can live above the ground :D)
So yeah, I hope I explained everything well. Glad you liked it!