Wow, unconventional, challenging, tricky in spots, timing runs not too bad, requried thinking out of the box! The only annoying thing was getting the first portal on the ceiling correctly to trigger the release of the first cube. But hey, who said it was supposed to be easy? I especially like the length of the light bridge timing. Made it a logical puzzle instead of exercise in mousemanship! Thanks!

How to make it better... Well, providing a way back across the goo after speeding there to push the button. I couldn't progress without pushing that button and was trapped there once I did.