I'm really happy you enjoyed it!
As a child I also used to play The Incredible Toon Machine and Crazy Machines a lot.
It's really an honor to hear that it evoked positive memories!
So naturally, when I heard the theme of the game jam, my mind instantly went to that, especially because of all the different ways you could design machines, it would give us a lot of freedom.
I agree, that the physics could be improved a bit.
Regarding the eraser, I think I know what could cause that, and I'll look to fix it in an upcoming version.
(I didn't notice it myself, but while designing the rotation, I thought that it could become an issue)
During playtesting with family members, I also noticed, that the menu came unexpected and that it wasn't documented or well introduced.
As well as the mode changing wasn't that expected. (Sometimes people would click on the items and they wouldn't get moved, because they were unaware that they were still in "Play" mode).
I intend to work more on it, even after the jam, it kind of gave me the confidence to know that it can be done.
Again thanks so much on the feedback! :)