Neat concept, but the game moves at a glacial speed.  It also seems like there's not a lot of choice in your upgrades as the cost seems to scale exponentially so you're pretty much forced to upgrade everything which makes it seemingly impossible to lose?  I'm not sure.  Something bugged out on me around wave 30 where I seemingly got way more souls than I was supposed to or the cost of certain upgrades actually gave me souls instead of took them away and I was able to completely max some upgrades.  I think this game has huge potential.

Wow what a trip, I made it to dawn!

I love how ridiculously big the soul prices get, and the enemies look like they're burning diesel when they come for you XD Really great sounds and effects!

I made it to about wave 52 before the enemies started closing in on me and doing some serious damage, but then... the prices started acting weird and jumping around, sometimes they were negative and paying ME when I upgraded. I mean, yes please! But I definitely took advantage of that and maxed out several stats. It's so satisfying though when it's like a constant barrage straight into the face of that little hooded guy. Great job!