Finished some more Atlantis levels today, it now has 7 rooms out of planned 30. I'm making nice progress, if I can keep up the couple rooms a day pace I hopefully have Atlantis done this month.

I'm curious: what is your process for designing a level, especially with them being so short? Do you just kind of attack or do you have a specific method you like to apply?
I try to come up with various traps or objects (such as the spikeballs in above image) and then try to come up with various different ways how to use them. For example, in some rooms they move back and worth on rails, or in some rooms they are floating in water.
Another example could be gates in the pyramid, at first you encounter variety that needs to be closed so you can use them as walls to block your dashing and reach the goal. In some other rooms you encounter gates again but this time you need to open them to proceed. And further ahead you find rooms where you need to press buttons in order to alter gates open and closed to proceed through the room.

While I do try to think up new puzzles when ever I am not at computer and working, I usually just sit down, make a new empty room and just start to place things and traps in it and try to figure out clever ways to reuse already encountered things again but in new ways.