First off, MAJOR props to the aesthetic in this game. The music and the style of everything really fit into a kid-pix style atmosphere. The design was completely adhered to without any design sacrifices; I appreciate the texture that denotes interact-able terrain. (I don't know how you made the background feel like one of those screen-tone things that comic book artists use, but it's so perfect.)
Also, I may be biased (haha), but treating "scale" as not always linear, and depending on axis/rotation is DEFINITELY the play here, and I appreciate someone doing that completely right. This is really impressive especially in real-time, when the player is moving simultaneously.
I did get stuck on "Ride the L train". Trying to flick the L fast enough for the cat to get on it did hurt a bit while holding the mouse, and I do wish it was just a *smidge* lower. Additionally, even though intuitively I know what side to scale, and it clearly doesn't work the same in most drawing programs, I found myself using the wrong axis when scaling/widening. (That might be a skill issue on my part though.)
It would also be nice to get an undo/deselect button, but that's probably something that would be difficult to implement while maintaining tricks like moving the selected platform while the player is on it. (Especially in the short timeframe of a jam!) Oftentimes I select the wrong thing like a small portion rather than the whole platform, and that causes me to have to restart the whole level.
Oftentimes with open-ended games like this there is a question on how to restrain the player while offering freedom to design a creative solution. With such freedom such as this to draw your own design I think y'all nailed it perfectly on the head. I honestly think that this would probably work as a full fledged game once the jam is over.
tl;dr, this game is really cute and inventive, love the little creature, amazing job