So, I passed level 1 on my first try. I failed level 2 three times, fell through the level, it then said I was on level 3, fell again, and it said I won. I don't think this is intentional, but I found it confusing. When restarting a level, I wish I was given more agency over when I start, as I found myself basically dropping the second a level restarted since there was a few seconds between me dying and the level restarting.
I think Flappy Bird is a fun game like this one. However, I think it needs a little more polish mechanically to allow the player to start when they're ready in case it lags between them dying and restarting like it did for me.