W-Wow, sorry for the late answer! Thank you very much for your appreciation <3
I'm happy you've liked both the characters and the mechanics :3
About the Q button, you're totally right. The tutorial is one of the latest things added, and it's not well polished.
The same for coins :( There should have been a final recap screen, showing your coin record, but we were too close to the deadline, and we decided to skip that feature and dedicate more time on debugging.
Again, thank you for your enthusiasm!