As for a few hours, it's really good. I like the time stop mechanic, but there were some details I would suggest: the ghost movement is really slow and R should be a toggle, just like Q so you hold by pressing R and drop it the same way.

The level design was a bit peculiar. You can probably cheese the whole game with one box, since you can drop it and immediately after that, jump on it. Not sure how much of it is intended. If it's not then you could just make it so there's a delay after unpausing time before you can jump. 

On the second level you have another box. However, it's not really visible. You have to jump to see it. For puzzle's sake, you could've lowered the top floor so you can immediately see the box and think: "Huh, this box is over there above! Maybe I can use my time powers to get it!". Otherwise it becomes a guessing game of sorts.

I also got stuck in the level with the indiana jones-esque boulder. I didn't get hit by it, but it pinned me against the wall with the box and I got stuck in the wall. That's a bummer.

Still, good job!

This was pretty cool. I really liked the double jump mechanic, made me audibly say "OH?" I agree with the other comments that the constant halting was a bit annoying, but I think this idea has a lot of potential. Reminds me of Brook from One Piece!

the ghost mechanic is so creative, and I see a potential for a two player mode of some kind. impressive!

I love the concept of bringing the block under you mid-jump to essentially double jump, but the ghost is so slow to retrieve the block it kinda halts the gameplay over and over again. If you make the ghost faster or have a quicker way to control it, it would make the game a lot more fun.

Nice Little Game. The Character Got Glitched many times after unpause just fix that thing.  

I feel that the ghost should be the mouse cursor or something like that, the actual puzzles were pretty tedious to get through since you had to reuse the same exact box and drag it with you throughout the whole level

loved the ghost mechanic. I think the only thing I'd change currently is the ghost movement speed. I think the ghost should be faster by quite a bit