I played it and have a few bit of feedback. I'd like to be able to use the keyboard to interact with the popups rather than mouse so I don't have to take my hands of the controls.
It was hard for me to see the moving platform on the gray background. I would have liked it to be a bit brighter.
Getting sent back to the start for taking the upgrade seems quite harsh, it made me not want to take it since I didn't want to redo everything.
Other than that, it's a nice simple little platformer. Good job :)