aha, very enjoyable. i love physics games!
i believe enjoyable is a perfect word for this game. It's not addictive, it's not buggy, it's not anything... it's just.... fun.. it just makes you happy to play.. it gives me joy to play it.. and not even joy in my pants! it is a grand huzzah thrice-forth!!
Seriously though, i do love this game. i have yet to beat it, but i hope it has a level select at the end. because if it does, it'd make the perfect "lunch break" style game! it feels like a storybook, and despite the entire game feeling quite a bit like Roco Loco, it never quite feels like the game 'directly'. it differs just enough to not feel like any sort of rip-off, yet still feel happily...familiar... theres another perfect word to describe it.
Really, i love it. i absolutely LOVE physics based games. and i particularly like games like this. Tri-Achnid is one of my all time favorite games, and this peaks it simply because it's so simple and fun. Tri-achnid was a better game (no offense intended), but it was more complex and serious. this game is simple, and just for fun, and for that alone it gets good marks.
4/5. i really like it. please do some more work! you have talent! this game is really.. enjoyable. (oh, and thats an 8.5/10 up there)
(PS: I love the dual physics engine you added, and the preloader could've kept me interested for a good 10 minutes before i got board or impatient)