This game is awesome! Played the demo for a few runs and just felt that it had *something* and wanted to go-ahead and pull the trigger on buying the full version -- and the full version added everything I thought the demo was missing (mainly a small little hub to pick a randomly-offered load-out before each run);
another person described it as "Nuclear Throne but first person" and it scratches that exact same itch.
I keep finding myself want to do a new run immediately after losing, and even with only playing for two hours (at time of this review) I keep finding each run different and fun. Really like it! I don't normally like shooters at all, but I love Nuclear Throne.