Interesting prototype. The movement was not clear from the start, I thought I was meant to flap my wings in order to move so going up was no problem (flapping left and right repeatedly). But moving from side to side was quite impossible.
Luckily I stumbled upon holding down the key, which teached me that I don't have to flap.
After that it played smoothly. It's still a tricky control scheme but that is part of the game and way better than the flapping I was trying to do ;P
Great job !