i had some more time and added the first few cuboid levels.
you can copy and paste them into a new textfile named level+levelnumber (without the txt. in the end. for example level3 )
that would be level2:
000000111
000111131
111111111
121111
111
there is no need to fill the empty-space with zeroes. it just looks better in most editors
level3:
111
131
111
1
1
1
1
1
111 111
1211111111111
111 111
level4:
111
1311
1111
1
111 1
111 1
1111111111
111
121
111
and finally.
level5
1111111
1 1131
11 111
111
121
111
guess next step is to add more stuff. like in the real game,too. break-able tiles, portals. etc.