Bone.exe is an action platformer for Windows PCs that parodies various internet and video game horror trends. It features characters and settings from various creepypastas and and urban legends and puts them all together into a gun-based platforming game wrapped in a mid-2000s Flash game aesthetic reminiscent of Edmund McMillen's games. Despite all of that, the game does appear to have some affection for the stuff it is parodying.
rythin for this run decides to fight all of the bosses the game contains as fast as possible. This is done by finding areas that contains secret bosses and collecting all 24 notes that are scattered throughout all the levels, which then unlocks a bonus boss at the end.
You can get the game here.