Excellent game. Worth the hours I'll probably spend on it. Add a shop and a few more equipment slots (amulet, miscellaneous) and there's a game I'd pay for.
I only came here to comment and rate it down without actually trying it. Well, I failed. I actually tried it. I'm still rating it down, but at least now I have a good reason: It does, in fact, suck.
Yet another save game obliterated the moment I closed my browser. I've done everything I can do from here to prevent it, so yeah... this game has problems.
Not good. I liked the first one, but this one takes waaaaay too long to get even the most basic upgrades. I lost interest at wave 3, having upgraded nothing but weapons, and having failed wave 2 three times (in order to collect more coins for upgrades). The progression and curve is just plain crap. TL;DR: First game is infinitely better.