I liked the classic "pile-em high" type theme here. I think the music was a bit too pop and 'pushy' for want of a better phrase and something that could alter and change as the tower gets higher would be cool. Maybe it does that but my tower didn't get high enough. :P
There was a wee glitch for me that sometimes happened where the top of my tower would be below the viewport and I wasn't sure where to drop my next item... maybe that was on purpose for further risk?
I saw some particle effects when the objects landed, but wanted more and more of a reward/success message. Bbut I very much know the element of time constraints in a game jam... I wanted to do loads more too!