Nice and well polished game!
While the metal ones can absorb the meteors like crazy, I like level 5 for the fact that it flipped my head around that the bunnies can die of fall damage just when I felt this is easy.
The solution to the last one is kinda unexpected. While it's an interesting use, a bit introduction to similar concept beforehand in a simpler environment would be great.
I like the indicator. It clearly tells what to expect for player to strategize around. It would be great if the level designer can tune the length, since in the crane level, the contact point was not visible.
I think one great improvement would be to save the player's layout upon each defeat. This would allow players to iterate their mistakes more easily, and make experimentations more accessible.
Other quality of life changer would be to have hot keys to the items, it makes selection quicker and easier. Same for allowing faster prototyping.
All in all, very impressive for the short time frame we have :)