This is so far the best I've played so far! The platforming mechanics as well as the cursor implementation are done very well. As someone said before you can exploit the box manipulation to float around, but I think a simple fix for that could be to make the objects not interactable with the player while they are being dragged, but that's a very minor problem. The puzzles to solve were done very well and felt very satisfying to complete. The gravity mechanics were genius! The only gripe I had with the game was that I could not figure out how to properly complete the first level, I would grab the first jewel off to the left and then the level would end itself. It did not hinder my progress at all, but I figured it was worth mentioning.