I played this game on my stream (VOD) and you were in the stream too :)
Overall, I had lots of fun! The puzzles were autogenerated and had a lot of variety in them. The tutorial was good and explained each mechanic one at a time so I didn't feel overwhelmed, and by the time I started the game itself, I understood how things worked more or less.
In the game itself, I'm not sure if a lower density of objects makes it easier or harder for the game. I think I had quite a bit of trouble in one of the stages (maybe it was low or medium density), but I eventually solved it, and the sense of accomplish was great! I liked the variety in the number of items, buffs, debuffs etc, and it would be good for some items to give their benefits right away (e.g., the hourglass that adds 3 turns). For things like apples that give +8 energy, it might make sense to wait, since there are other items that give +40% energy (coffee iirc), so I'd want to have an apple then a coffee together.
For improvements, having some sort of player icon in a lower alpha might be good, or the tutorial could explicitly mention that the highlighted square is where I'm at, since initially I thought the home icon was where I'm at. Other than that, I think the game mechanics are great.
Another possibility might be to have a set of specific levels to go through that you've hand-curated or hand-created, so there is a definite increase in difficulty and progression. After which, players can play the random mode.