Honestly, the soundtrack is half my enjoyment of the game itself. It's short - total runtime around 17 minutes - but the songs are all very good and mostly very cheerful. Perfect when I need something to keep my mood up at work. The only song you won't have heard in-game is Maxo's remix of Lovely Forest, and while I think it doesn't quite surpass the original, there some really neat details and ideas in it. I bought it on bandcamp a while ago, and don't regret it. Well worth the price for Lovely Village alone.
Zoom around the map, shoot things in the head, fire off ridiculous superpowers... what more could you want? Excellent flavor and personality - maps design, environments, gun look and feel. Augmentics feel good to use and are powerful. Movement is fast and you can explore the maps a fair bit. Guns are fun to shoot and customize (but definitely not balanced and some customizations do basically nothing). Story makes no sense, but doesn't get in your way too much. Inventory is hard to manage and the stat mods on them don't all seem to do what they say they do. Glory kills are pushed a little too hard. If it clicks with you, you'll probably get 15+ hours of gameplay (I have around 30).