Okay so game started out nicely with bit of confusion like every game, not knowing what ius best stradegy etc, then around round 4 i realized that i want to die a lot to make turrets and stop them getting to even close to crystal. And it was nice realization and it worked. Problemn is it was the same thing i did over and over again and around round 12 it started to get boring. You should have just ended game earlier becouse it gave no difficulty boost(or made different enemies and variety but becouse this is gamejam, shjoretr game wouldve been okay). So yeah great concept but too long and not enough variety. Btw sometimes audio was pretty terrible becouse so many enemies are dying same time. And your pretty good with art also:D