I'm fascinated by the digit building mechanic, and I really wish there were more levels using it - it's so interesting, and I feel it went heavily unused in further levels. I was hoping there would be levels requiring to build up certain numbers to gain more platforms (through static lines that you cannot pick but can still form a number or something, to prevent you from always making the 1 or sth). Or even make numbers that you cannot destroy and then rely on them changing to navigate through a maze of lines?!
Launch platforms are also cool, but it feels like you tried to do both gimmicks without being sure which one is better.
Platforming feels nice, but some challenges feel unnecessarily precise (unless I overcomplicated some solutions LOL).
Also I know Raylib when I see one! I hope you had fun working with it!