It's basically a puzzle game, a mostly cool one. There's a fair share of interesting puzzles (Although I'm not very fond of the gate jump one). There is one obvious skip at the room with the teleporting boxes, but the other puzzles are nicely made.
However, for some reason, the game gets really broken from the room with the red smiling face on. The next room features three buttons. One of them kills you, the other one allows you to destroy some blocks by clicking them and the last one deletes your save file for some reason. Uh...Alright, then. Once you get past that room, there are two screens of nothing followed by a simple needle screen, after which you'll reach the rooms with gravity arrows that kill you. There's only one way to get past that room as far as I'm aware of, which is sliding through some fake blocks that don't disappear, but they only lead to a screen you already got through, with absolutely no changes. It's a dead end. The red smiling face screen and the screens of nothing have a fair share of fake blocks that don't disappear, to the point where they seem unfinished. I also tried out hexing it just to see if I wasn't missing anything, but even though there are screens afterwards, they seem even more broken and unfinished than the other ones. Nothing was coded, nothing leads to nowhere, every single screen is absolutely pointless, lots of fake blocks that don't disappear. So, unless I'm missing a lot of stuff, you really can't legitimately go further than the rooms with the killing arrows.
I mostly enjoyed the normal screens, but this game feels heavily unfinished in one of the worst possible ways. Highly not recommended.