Shockingly addictive, I played non-stop. I wrote in my notes that the level of juice and visual feedback here is excellent and I stand by that. I think you took shockingly simple visuals and made them appealing, and engaging. There is a lot of personality here and I really like it. I also like the idea of replaying levels with score modifiers. Very cool.
As far as feedback goes, when I died during the LOOP mode the text on the button said "Retreat" but when I clicked it the level just replayed. Wasn't a big deal, but figured it was worth mentioning.
You made a really excellent game.