Will this work if downloaded on chromebook
No. Chromebooks require specific support that the dev doesn't provide. Further, Chromebooks are based on Linux and this app doesn't even "support" Linux. Normally Chromebook native apps can use web-based APIs, but in this case, where it's a game inside your Desktop Environment, it isn't possible from within the web browser. It might be doable, but they'd have to go far out of their way.