Made it to the third level so past the 1x2 and 1x3 blocks. Just letting you know so I have some street cred
Needing the Don to face a certain direction to pick up cubes is a neat idea but means I spent a lot more time to trying to line his face up than I did figuring out the solution to the puzzles, which made it still feel slow getting back to where I was after I quit on accident. Being able to change directions against a wall or something might keep the puzzle aspect of realizing you need to face a certain direction after some moves without having it be so slow to get facing that direction
Other than that, it's 3D Block Dude, pretty fun
TL:DR This is a unfun Mobile game quickly ported to PC/consoles