(I am now in a rush to test as many games as possible to help, so please do not mind the cursory reviewing style.)
expanding upon tz_enterprises: what’s worse, the menu hint associates obstacle 1 with 3, and 3 with 1; not very serious since the numbering is arbitrary, but let’s keep it as simple as possible ;)
nice settings/options submenu, not yet seen such a developed one in any of the games I played!
I notice you made the music yourself; nice
the retro/pixelated art is simple but nice and clear
EXCEPT a bit hard to tell an ending tile from an acid tile, maybe add something on the ending tile
the main moving mechanic is akin to that of DOS[][i] (where tiles can be numbered)
the 2D top view makes it harder (than a (pseudo-)3D one) to assess the current configuration of the die, although the leftward pattern does the job (diSe[][i] uses a similar representation, although inverting the lateral sides). I suggest a 3D/perspective representation of the state of the die might be better (I let you judge; I used one).
using the lower side instead of the higher side as the ‘active’ one may be harder to see; not sure and not very serious, keep your convention :)
no key to go back to the main menu?
misspelling: ‘REMANING’
some bugs, apparently: losing for no reason on a standard tile while still having available moves, in level 2 (in the center of the beginning square and going leftwards from in front of the acid)
I did not solve everything for time reasons (still an awful lot of testing[][b] to do!!), but the game seems to have a fair mix of difficulty levels.
About difficulty: level 1 was essentially a tutorial level; had a hard time in level 2 (which I quit), but solved level 3 on my first attempt. Had some trouble for level 4 because the move count is short/tight, but solved it on a semi-intuition. Quit level 5 after some attempts (I confess I am a bit too tired to really work it out seriously… ._.); sounds reasonably hard, both in architecture and move count.
maybe add some more sounds?
Different graphics for level 5, so you tried to provide several ‘themes’/environments! :)
This is a coherent puzzle game, with minor drawbacks. It may be simpler than several other puzzle games in the jam in its mechanics. Had a good time. :)