I couldn't for the life of me figure out how to move forward so I ended up just randomly spaming the two buttons and t worked out other than that the game looks great and I love the voiceover. Great game !!
If you flap in the direction you're facing (ex: right when you're facing right), it'll create some forward thrust while being less likely to flip you over. Gotta find the right cadence. Of course you can also tail flip off of objects you're nearby to sling yourself. Flopping the opposite direction of the direction you're facing (tail into the ground) will launch you into the air.