I like the minimalist artstyle and sfx mixes quite well with that. I have a few suggestions regarding the gameplay. First of all, the prices of upgrades increase too fast: why buying an upgrade for 8 000 souls if the goal is almost the same? Thus you reach the maximum upgrades that make sense too soon and just click until got 10 000. Maybe should just increase the goal each time you about to reach it? Second of all, I would prefer to see more visual response to my upgrades: maybe different types of adventurers? Having the stats of the upgrades being displayed would also be a good addition, otherwise it is too hard to tell what is exactly changing when I do an upgrade. And yeah, more then two upgrades would be much cooler