I have a very good idea for a level design!
L A V A L E V E L S W I T H Z I G - Z A G S W I T H S P I K E S A R R A N G E D S T R A G E T I C A L L Y makes it more challenging i guess
(but not badly arranged otherwise it'll be (almost) impossible >_>
And some NPS's here and there would help