Already posted my thoughts as a comment, but here goes again in maybe clearer wording:

• Great design of both UI and 3D objects
• Hypnotizing music
• Fun, simple concept
• Easy to understand gameplay
• Creative, more than one solution possible.
• Humoristic writing
• Quite good polish for a gamejam game!

Space for improvements:

• Text sometimes hard to read, mostly the minus signs.
• A bit unsmooth how you need to look through all the objects to find something with the property you need. But then again that's also the game.
• Not super clear where it is possible to connect something or not.
• Why can't I build infinite size?
• Would have liked to zoom in and out on the object
• Would be nice to scroll through the list of choices with the mouse wheel.
• Can't exit the game unless you finish all levels. (Or is that by design? ;) )
• Save a gallery of your creations