First of all I need to mention this I am a student for a school project and dear God I'm desperate.
The project was supposed to be a flappy bird game with vfx and a countdown (yes weird) Plus the teacher didn't taught us anything just gave us a sing tutorial that doesn't even contain the stuff she wants
For one the timer goes way to quickly and even though It's originally meant to only be 60 second I sorta fixed it by doing 600 seconds. But I don't know what went wrong with the blocks
Next I don't even know what happened to the pipes to even explain it
Clock Timer intervals are measured in milliseconds, which are thousands of a second.
So if you want seconds you have to multiply by 1000.
Also, your limit tests (=0) are paper thin. If you miss the 0, you will keep going negative forever. I like to check <=0 to stop a countdown. It's more robust.
Currently the blocks look like this, everything in the game seems to go fine EXCEPT, the pipes just refuse to loop and just gets stuck in the left side.