I'm glad it was fun. Can you say more about what you didn't like in the controls? Was it the part selection? The rotation/flipping?
took me a little while to see it was Q and E (of course one should read the f'ing manual). then those pipes were always looking the wrong direction. also for deletion, maybe a right click would be nice.
This doesn't detract too much though, and i have some of these annoyances in my game too.... never enough time for complete polish =)