Thanks for playing and the valuable feedback.
Yes, simplicity was the goal.
I am also not that happy with the music part. Saved it for the last few days, as I am usually pretty comfortable with composing something for the game. However, did not feel it this time and just needed to go with something decent (or even less, based on your comment :D).
The goal was, that it can be played on both phone / tablet and desktop. Of course you do then some compromises. If you played on the desktop you could have also used the SPACE bar for the flying part.