Inconsistent rules for how blocks move through structures (I solved the lockless one by rotating through a wall where before and after that had not been possible) and an unintelligible method of arithmetic.
The music was repetitive.
The art style was wonderful and funny, properly cartoonish.
I would recommend a more descriptive and clear tutorial, if not a reworking of your parenthetical use. Every time I see 1+2-3 in a simple math game, I want to say ((1+2)-3)=0, not (1+2)+(2-3)=2.
say, further in the future, it becomes possible to have a string of numbers with random values as long as 4 signs long.
A+B+C+D+E (4 +'s).
It is natural for the human brain to associate the methodology with left-to-right bracketing, two at a time.
((((A+B)+C)+D)+E)
Please come away with thIS knowing it comes from an amateur critic and a mathematically inclined mind. Best of luck with your future endeavors.