Still working on a hard mode playthrough, but this is a very good retro platformer/shooter. Very simple controls, gameplay and graphical style but immensely enjoyable from all angles. Just the right balance of difficulty too, even in the hard mode. They don't throw bullshit challenges at you for no reason, the levels are just very well designed and feel fair while punishing you if you slip up. Great music too and just overall pretty damn charming.