I also worked more on the level swapping mechanics mentioned yesterday, adding some effects to it and actually testing it for the first time.
Just as I was going to post this, I had an idea on how to improve the visuals for it, looks decent enough for now
I wouldn't be surprised if I go back and polish it more later, though.
I also got placeholder graphics for first level up and running, as well as laying out collision, and getting Death walking and jumping around somewhat decently.
Further improvements include adding ladders and high-tech climbing skills to Death's repertoire.
I also need to add more to the level swapping mechanic -- being able to select which pieces to swap (currently just hard coded for testing purposes).
I recorded a clip (using my phone, later videos will be in higher quality) which shows both the new placeholder graphics and the level swapping mechanic.
It looks as though things are going well! The level-shifting mechanic is one that I've seen before, and which can produce some interesting puzzles, I feel. ^_^