Ah snap, I got the thunderbolt crash too. I didn' knew what it was before reading the comments. Second run was EXP only, it's like a no-upgrade-equipment run. Only the 0-gold-only Mysterious Cat Tower players are above that in skill.
I also had the talent point thing starting with level 3. One thing that hasn't been mentioned yet would be that I think you should add optional mouse controls in the overworld, since everything else is also controlled by the mouse. Additionally, I think a dedicated close button to close the menu would be neat too.As far as graphical stuff goes, sometimes the tiles were no longer perfectly aligned like below or would even flicker:
Anyway, it's a cute game. I hope you don't get struck by the nodev curse and keep up the good work.