As far as I know, Spidermon is one of the levels that will get a complete redesign.
Jenga is also one level that will get a complete redesign.
I feel the same way about Exploration mode right now to be honest, but keep in mind that we only have the FIRST TWO planets currently available. Maybe they'll become more interesting and have more variety as you get to later systems? Only time (and Aayrl of course) will tell.
Will be happy to.
Please post more feedback, It helps me tremendously!
If there is a way, I would like to see the level itself be brighter since it's hard to see where the walls/sides of the platforms are.