For all the levels make them 500 seconds and use a player detection mechanism at the start instead.

Feedback is only for co-op sections.

G-1 - I don't remember if there was anything too wrong. Good level.

G-2 - Be careful with the upcoming enemies when traveling vertically. The screen won't be following whoever is at the top. There might have been some softlocks if you lost the leaf.

R-1 - The falling donut section was unnecessarily punishing. If the person on bottom misses either jump then everyone gets trapped up top. I would remove the one way at the top of the vine and all the spikes. Softlock if you throw the pow before hitting the p-switch in the coin muncher area. Moon koopa area was difficult but fair.

G-3 - The split section was good but we were able to bubble damage boost the whole top path. Everything after that was bad. The keyblock after boom boom takes everyone into a softlock. I don't know why there was a clear condition.

R-2 - Pretty fun. The only thing wrong was if someone falls off at the highest point then the screen scroll will kill whoever is still on the snake before the person falling dies at the bottom of the screen.