I thought that the game is complete--that there won't be any additional worlds. I might be wrong, but I could swear I read that somewhere...
Nope, a World 5 is comming. Read it somewhere and it looks like it's a frozen world given the last door of World 4
NVM there is gonna be a world 5 http://www.kudos-network.co.uk/e3-team-phobics-bounce-on-world-4-and-bounce-on-2-coming/
Hey everyone! We are working hard on World 5, Bounce On 2 and some other goodies coming out soon. I can't say when, and we know it's taking awhile but it will be well worth the wait! As far as Micro Mayhem goes we started on an update but its currently on hold due to the other projects, unfortunately MM did not do very well so it is hard to justify spending much of the companies time on it but some of us have worked on the update from time to time on our own time. Follow my twitter @jonaswills for updates, as soon as we have anything to release that will be the first place to find out.