Great job again, Adam. I don't remember this game at all but it was fun having a crack at the game anyway.
You've got some kind of bug with the title screen selection of levels, options and exit game buttons. Using the cursors to navigate won't let you select exit. You're able to select options but Space to activate doesn't work on the button. Exit isn't available to navigate to at all. Using mouse and clicking does work ok.
Also noted flickering in the arcade version when mouse going up the ladder with a flower but possibly that's meant to do that? Got mouse stuck at the top of the ladder as well due to some glitch but doesn't happen all the time. The worst kind of bug.
Hope you get some good comments for your work.