I've made a simple lvl and it's possible to stay balled up for several seconds at a time, but the lvl will make the player warp back to the super-speed tubes in order to 'reload' the player's ball state. This kind of system wouldn't be very useful in most lvl modes, but, theoretically, you can make a lvl like this:

It involves triggers, warps, a LOT of empty space, lots of suckertubes, pinbal flippers (these will keep the player balled up most of the time), pinball bumpers (placed in key positions so that ppl will hit one before they unroll themselves...same goes for the suckertubes). So far so good.

There are no springs, because ALL springs, even those in crates, disappear after you use the super-speed suckertube. There should be poles, which temporarily makes the player into a ball and warps to take players regularly to superspeed suckertubes. Oh, and the warps and poles should be hidden by foreground layers so that ppl can't see themselves unballed (haha I'm so fiendlishly clever ).

Anyway, the lvl I have created is just a beta, has hardly any gameplay, and has only got some very basic stuff in it. Plz don't upload it ANYWHERE without my permission. DL here. Don't forget to visit the rest of the site. I recommend you try TESTTRACK2 first, because that's the one with the most stuff, as well as the only one that doesn't give amnesia errors.

EDIT: My host (www.beplaced.com) may not like you, so if you cannot DL the .zip file, gimme your email via PM so I can mail it to you. Oh, and I need a few courageous souls to come and complain about this DL problem and force beplaced.com to fix this culprit once and for all.

EDIT 2: You *could* just download from the link provided at teaparty.beplaced.com if nothing works. Plz don't feed the whale. It has put itself on a strict diet because I've, unfortunately, been giving it too much fruit and sugar.