The puzzles are actually pretty good - your game is among the few that uses the 'time rewind to past timelines' kind of game but I enjoy your rendition of this because for some of the puzzles you integrate the time element quite well! For example, when the plant was left with the water, when you return to present time - the small plant became an entire forest!
One of the most significant gripe I have the significantly detracts from my experience are the controls:
Q and Spacebar, do not always work 100% as intended. It can become a bit cumbersome when trying to pick up items but having to adjust the character ever so slightly, all the time just to pick up stuff.
This was a fun neat project and a very clever way of integrating time narratively into your puzzles. Very simple puzzle game - very nice!