Thanks a lot for playing and for the feedback !
The bar mechanics were a late addition, it's part of the score system, everytime it runs out you get a score penalty, and you can see your score at the end (there are 16th waves). I wish we could've made it more clear, but we ran out of time (fun fact, ryokugin didn't sleep at all this weekend so the score feature was built while he was half asleep on his bed, telling me what and where to code. Yes, he did code blindfolded. We also fixed at least 2 bugs in this configuration)