Fun idea, I liked it! The music was fun too. I agree much with Gusabus's take, but I didn't really understand how I was supposed to judge my minions and found the ideal strategy was to just spam them as soon as possible without any thought to what they did. So it definitely needed some more strategy elements, I think. Great job, if this was your first jam!

Really cool idea, I liked it a lot! Very clever how you integrated (and reversed) the mechanic of choosing new items and upgrades at the end of every round. The artstyle is great in that it's minimalistic but clear, and the music goes well. I would have appreciated something to show where the hero's destination was - for example, a red line - and it seemed a little too easy, given that I defeated the hero in the third round. It would also help if there was an explanation about what each of the monsters do. Other than that, good game! Well done!

Needs a  Fast-Forward button, but very cool idea!

This game is very simple but also very fun!, I love the idea of spawning monsters in an attempt to kill the player.

The minimalistic & monochromatic art style is appealing too :)

The upgrades add an extra level of strategy & replay value.