tldr; get it, and make a donation. It's worth paying for.
The long read:
Marvelous, if maddening. Very intuitive controls, very confusing traction. I'll get used to it soon enough. The Easter eggs are adorable and charming, despite being REALLY 'clip-art-of-the-90s' looking. Cheesy, but in a funny Comic Sans sort of way.
I really think this one is a 'must play' for anyone who has played and enjoyed 'DEPO'.
Just had my first run with the falling spiral cubes, tubes... and whatever else follows after the point where I died. That level is FABULOUS! Puzzle design, visuals and music are all particularly fun.
I hesitated about DEP because I thought it might be disappointing after DEPO was such a phenomenal follow-up. Sometimes, I just love being wrong. DEP is equally brilliant. A+