itch.io

honestly, I have no idea how that helps with beating the game! Maybe I figured something out by trial and error that was supposed to be gated by the hint

mild spoilers below:

I was able to complete the game with or without collecting the 5 red triangles- when you collect them there is some Japanese text and I'm not sure what it does, anyone know?

Great game!

Oh, maybe it wasn't up yet when I posted, haven't tried yet

Was able to run on linux using Steam, selecting Games->Add a Non-Steam Game to Library, then right click RUSH.exe->Properties->Compatibility->Force the use of a specific Steam Play compatibility tool->Proton 9.0-4

Runs locally, haven't tested mutiplayer