Thanks for the feedback ! I saw your game while submitting mine, and yeah we got the same 3D/2D idea (btw your game is really fun !). Yes I was feeling like my exposition scene was a bit long, so I let the user skip through it if he wants to. And I'm feeling the same about the UI "bip" sound, I'll change it / add some more variety once i make my post rating release. And I'm already thinking about proting this on Android ;)
Thanks for stopping by and playing my game !