on a laptop with keyboard+touchpad, the control scheme is a bit tough. would love to have an option for looking around controlled by keys

Interesting game! I ended up downloading it and trying it in the browser, worked well both times. It look a little while to figure out that the cubes where planters and that I needed to grow them, but it's possible I just missed some context dialog. 

I also noticed that the collision was the same for both the past and the future, but that didn't prevent me from completing the level. The mouse sensitivity was also through the roof, I think this is probably just from your mouse having a much different DPI setting than most. Thankfully I was able to set mine really low which made it more playable.

Overall I think the concept is interesting, I wish there where more puzzles so I could explore this time mechanic more.