One flash game that I specifically like is one called spewer. (Link at bottom.) It is not a new game on the website, but it is a great game and it is quite fun to make custom maps. Post any custom map codes you have on this page, please!
The yellow stuff is acid, and the white blocks with black dots on them are acid tiles, which melt away when you spew acid on them.
I couldn't really check what to do because I didn't have that much puke/goo left
When you are in "tar-puke" mode (black), you may find yourself somewhat short on puke. What I recommend doing in this situation is going back down into the area with red puke and eating all of it. You can get back up using the tar puke, and you'll have enough left over to get you through acid mode.
but I think I have to waste some of it on a block to get through it.
Theoretically, you technically don't have to use up any puke; you can still destroy one of those blocks with the same amount of acid as you started with. But that's something I'll let you figure out on your own.
I was just building a level of my own when the game screen went black. I'm too frustrated with the editor to create anything new right now. Perhaps I'll release something in the next few days.