I absolutely love the concept behind the game, but it feels a bit flat in execution. I think the idea of using a healing as a way of dealing damage is fun in most games, but it's not really a healing wave if there's nothing to heal and the only thing it's doing is damage, is it? I do love the "upside/downside" style of upgrades, though the game is easy enough (especially due to enemy navigation funneling them into straight lines by the end) that I'm not too sure how impactful my choices really were.