The tutorial makes it look way more complex than it really is. I do not have any suggestions on how to improve it, though. Maybe just “show, don’t tell” with animations instead of that much text — although i know that in a jam such niceties are not easy to make.
The “middle levels”, that is after the second or so up until the point things get unmanageable, are a bit boring. I kept filling blocks to create the shapes i had available and the beast had no way of beating me, so i felt like i was doing a somewhat pointless exercise waiting for more interesting things to come. This is OK for the first level, as i was getting used to the game; maybe the difficult ramp should follow more an exponential rate rather than linear, so that it gets to the good part faster.
I do not know if it would make things more complicated for no gain, but sometimes i missed a “skip” button or something. This happened on these “middle levels”, where i could see that gray boxes would form shapes i could use, so i was forced to fill a block, making me feel like i was “helping” the beast.
I think i would make the game over condition more obvious when the beast wins. Since i could no longer pay attention to everything, my experience is that the game “decided” to fade out and spit me back to the main menu. I assumed that i lost, but i did not see it.
I am amazed how you took familiar shapes of blocks and still made a unique concept with them.
Good job!