I was really impressed to see so much polish in such a short timeframe ! Congrats ! For your next game, I think that “embedding” the tutorial into your game world directly would be even better :)
Thanks for your support!
The button "info" gives you some info on gameplay such as controls and some hints.
I've been making games for a couple of years so most of the "polishing" you see is just copypasta from previous projects :P