Hello,
Thank you so much for your feedback; it truly means a lot to us!
Unfortunately, the sounds are still just placeholders from our initial setup. We will be making them much better by the full release.
The early game currently has a bit of a slower loop. We structured it this way to ease players into the game and make each session's skill purchases feel more impactful. However, as you pointed out, we have received this feedback quite a bit. Because of this, we will be improving both the economy and the branching structure in the skill tree.
Thank you so much again!