The player seems to be invisible when zoomed out.
Is this intentional?

Yep. if you want to see the place to start, you should press 2nd 1 time before arranging the tiles.
Made an important-but-not-visible update: I no longer have hard-coded maps!(nah, they are still in the program, but can change very fast now)

Yup. It always was.

aww, you are not alone for that, leafiness0 was also about to do it. Also, I now have appvars for the levels, and im coding scanning for levels right now. Also, the levels are in archive, since they are 216 bytes/sliding tile (the 'sub-maps'). I calculated that all maps take 40K together, so that is necessary lol.

I tested with 2*3, that worked. I can use any map size, since I store the levels this way in the appvars:
Data(X) ;First byte of the tilemaps
Data(XposStart,YposStart)
Data(Level width,Level height)
Data(Level offset)   ; So if its 2*2, it'll be 4 bytes, and so on :)
Hex code for all slidetiles (216 bytes each)
I might use RLE, since that'll cut the level size drastically. Should take a look at Nemo's tutorial on that

IMPORTANT:
Oh, to avoid confusion between sub-maps and tiles (sprites), I'll use those definitions:
-Tile: Sprite
-Sub-map: Slider

It just seems to be a loop of you on the homescreen.
Is this intentional?

Ahh, much better. I can't wait to play this on calc!

It looks great aeTIos. A pity I can't try it. But the screenshot says a lot!

Good Luck.