When the next version is complete, I strongly suggest resubmitting the game... After having a moderator remove this submission.
The overall design of this game is very well done. But right now, there seems not to be any 'sure' way to beat level five. At least, I haven't been able to do it.
Rebalancing level 5 (and any subsequent unbalanced levels) would very noticeably improve the score, I'd say to four stars in the least (also bringing it to be 'front page material').
Unless this game is resubmitted, it most likely won't get the attention is deserves.