Creative idea! Like kebabulon said, you should use set velocity for the pipe instead of addforce. Also on the Canvas for the UI you should use "scale with screen" instead of "constant pixel size". Part of the menu was off-screen for me but that wasn't really a problem. The game was still fun! I'm just trash at flappy bird.

Of the flappy bird inspired games on here, I have enjoyed this presentation the most. It feels really satisfying to move the pipe for multiple birds. Good work!

Cute Reverse Flappy Bird Concept. GGs

Interesting spin on Flappy Bird! At first, I imagined that I needed to stop the birds, but I figured out that it was the opposite of what I needed to do :D

Great entry! the pipe feels a little too hard to control but otherwise this game is very intuitive!

Cute!  I wish there were like three strikes you're out, cause my poor birds were dead, fast! 

It's nothing too special, though this could be because I don't really like Flappy Bird. Not bad, but it feels like it's missing something extra. 

I like how you went about difficultly, changing the size of the gap is a really smart way of doing it, I also like that you're helping multiple birds through rather than following one, means you can get some really interesting changes between where you need to more!

Reverse flappy bird. Nice music.

Challenging flappy bird — requires a lot of button mashing though! Definitely worth a replay after first few times!

Really challenging flappy bird. The pipes are really hard to control. Still pretty fun.

Hey fun game. I got 21 in Normal mode. I would' have liked if it was a bit less clicky (like have an option to hold in mouse button instead of spam click). Great work!

you should try using set velocity instead of add force for the jumping. right now its hard to control the pipes

Hey! It's a good concept. I tried my best, but my high score was 5 in easy mode. I'm not a good in flappy bird )