I'm so sorry for that!
I'm assuming you chose Gen(the green one) because I found that the deployed game didn't have his face image. It should've loaded in the win screen but since it didn't, the game wouldn't move on afterwards. Thus, your endless load screen.
I've uploaded a fixed version now, so it should work :)
Thanks for letting me know!
Also, the backgrounds are from a shutdown game called Pockie Ninja (although, there are efforts to revive it). Somebody reuploaded them on deviantart: https://www.deviantart.com/maxiuchiha22/gallery/78297033/pockie-ninja?page=22