cursive seal
Concentration: A viking-style level with elements from Norse mythology like different realms (Asgard, Helheim, Vanaheim, etc.) and bossfights with different gods (Odin, Thor, Loki, etc.)
Brainstorming: a level based on a fully technological planet, like the death star, in which you have to escape from it
Scamper: Deadlocked but Abandoned - A run-down version of deadlocked with an eerie version of the music and parts where the level starts crumbling behind you, kinda giving the impression that you have to run before you get caught in the debris, there also should not be monsters in the ufo part since the level is abandoned, instead the player has to dodge falling parts of the ceiling
Ramsey method: A level where you have to jump from planet to planet as the star they orbit becomes more and more unstable, going through all the phases of evolution of a star until the end, in which the star becomes a supernova, ending the level with a stunning end screen (Source: https://en.wikipedia.org/wiki/Stellar_evolution )
thorny girder
hazy badger