Took me a while to try this game since it is a downloadable project insteead of a webgl one(I know 3d is kinda weird in the browser so it makes sense) but im glad I decided to play it.
The puzzle design is great and felt really satisfying, especially the last 2 where you need to use another blocks as barriers .
The problems I encountered were that the music stops after a while and int he third puzzle the red sphere block has ice behavior despite being presented as a fire one.
Had a lot of fun, awesome game!