Ah
Now I can see why you enjoyed it. If I'd even thought of that idea, I would have enjoyed tweaking it too.
I did play this level for about 90+ minutes, but I couldn't come up with a reliable technique. Unfortunately, if I don't get a solution after that much time the level has already bored me and I have no interest left to play it. Searching randomly for solutions isn't much fun especially when none of them work.
Trying to make an appealing level isn't easy. If I've learned anything in all my time, it's make them easy to solve in less than 10-15 mins. That almost always gets people playing. The trick is then to make sure it's also difficult to max out the score.