Potential...
It's there, but this needed a little more work before submission. Bugs include clipping into boxes (and becoming trapped!), exit doors that don't work, and medals not being awarded (Diffotron Beat, Pipemaze Beat, and Slick Slider all did not unlock for me). Fix these issues and this collection will warrant at least a 9.
It's alright for what it as a challenging game...
But I don't get the same feel that I got from your previous games. Besides the glitches that were mentioned earlier (such as collision detection, problems with the medals, and lagging from the game itself.), it doesn't feel like a Shift game. The design of the characters may have thrown me off. However, it's very challenging for a game and the music is great.
all in all
not bad entertaining, i havent played the other shift games so lucky for you from what ive read you get a good review form me, the lag is the only real issue I saw, ive heard about the box eating thing havent had much of a problem with it tho, anyways i would go on and on about fixing the lag but im sure you have plenty of that you lose one star for it cause its an easy refresh the page tempt fix, if i had to guess its something to do with the cache, but im not an expert by any means wish you luck and look forward to playing more of your games sorry for the long review
Bad
It would have been excellent if it wasn't that much over-laggy, I mean, honestly... It was near unplayable. Also most of the medals didn't work, for me at least.
The rest is good, the level design is challenging enough, although some later levels seem easier than the earlier, but I guess it can have to do with luck to do. I also like how you added the minigames, but they would have been 100x better if it wasn't for the lag and medal-bugs. It made it very frustrating and not fun at all to play.
It's fun, but...
... it is RIDICULOUSLY glitchy. Keys and gravity arrows don't always work-- in fact, it sometimes takes up to ten times touching them to make them work. As you can imagine, the timing-based and fall-into-place sections of puzzles kiiiiind of break when those don't work. Furthermore, the slider minigame becomes unusable when, well, THE KEYS STOP WORKING. And no, this is not a problem with the keyboard. No, it is not a problem with not having the game selected by clicking on it. Shift games are usually so professionally well done... this is just pathetic.
Glitches aside, though, it's everything you come to expect from a Shift game. Keep up the good work on /that/ front.