Sure! Since you asked so nicely i checked it out. The delay was almost completely gone. i think i noticed it maybe twice in 30~mins. Lots of fun! More feedback below:
After crafting, I noticed I was able to buy an upgrade even though I was 1 coin short. This put me into negative income but didn't affect overall gameplay. (see pic below)
I'm not sure if runes were meant to be implemented in this alpha but I was able to purchase 1. I chose the chain lightening but it doesn't work and I also can't purchase more despite my thousands of coins. I'd suggest adding text or something to let the player know Runes are bugged/unavailable here.
The progression felt very slow after buying all tree upgrades. Just felt like grinding for materials (please please PLEASE up mana core drop rate) and levels and ulitimately i gave up at stage 7 after unlocking all wepaons and armor. I'm not sure if this was the true end of the demo or not but it feels like I have nothing else to play for. (I assume this is due to Runes not being implemented.)