-Text bubble on restart is a bit annoying since it pulls my attention away from the puzzle with filler phrases.
-Minecarts feel intuitive.
-Monkeys are alright, but they feel quite static, since they act like a wall all the time it's just a matter of moving around the slide maze to reach them with the head. After the two monkey head area I back track and go down the other path to do more minecarts.
-I can't walk left to kill myself after the bait minecart, feels like a bug? Though, I guess it's like how you don't walk off the edge unless you slide into it... still.
-Lack of undo is getting annoying. Unless there's a really good reason, it just feels like a waste of life to make me redo everything for one mistake in input.
-At book select, at least in windowed mode, pressing up/down to scroll the selection can make the cursor invisible.
-The 1/2 in the corners of the book feel kind of pointless, since it never seems to be longer than two pages? Also, these notes are so short that numbering them make them seem even shorter. And the numbers are a little too close for comfort with the actual text(spaced like it's the next line of text). So for all those reasons, to me at least it makes sense to remove them.
-I reach a gold block junction, so I guess I need to go back to the monkeys and finish them.
-If you look at a pit after sliding in from the right, there will be an erroneous prompt to put down the head, still there from first sliding in. Also get a prompt to put the head down if you fall down a pit that has a walkable tile directly in front of where you character would be looking if he wasn't falling. Also the prompt sticks around after a level restart.
-I can see the top of the save icon in the bottom right at all times... I hope that's unintentional because it's ugly once you notice. [later] Oh suddenly the entire icon is in view at all times, either it got glitched or previous was the glitch. [later again] OK it seems like if you spam room transitions it confuses the animation and it gets higher or something. It's now 3/4 up my screen... Actually it's more like a rounding bug, it seems to go higher even if I let the animation play in full before doing another room transition.
-Turtle powers. Not much of note, though the left/right sprites are shorter, so it's only like 1/4 of a tile tall when placed down. Not a deal breaker, but making it larger so it's easier to spot for an unobservant player could be nice.
-Ice blocks being unpushable on ice feels odd. Would help sell it if you did an animation where he runs in place, to show it's too slippery to get traction or whatever.
-I get stumped on the 1 ice block 5 icicles room.
-I backtrack and do the stone triangle path, get stuck on the monkey and minecart area. Can't figure how to get the monkey head without consuming the needed bridges.
Well that's enough for now. I remember enjoying the previous demo, this was good too. Having no controller support is ridiculous though.