Thanks for playing and thank you for the kind words! :D
I also noticed that going up was not that easy/fun. Added ladders to solve that but they are a bit awkward to use (and then ran out of time)
+1 for 3D games! For this game I've used Godot Engine but I do get the appeal of Unity
The best tool is the one you know how to use well so whatever you pick just stick with it even if your initial attempts are far below expectations :)