The idea ist fun, the H is nice and I really like the pixel artstyle.
The puzzles are... mixed.
There is the typical simon says puzzle, which is nice since its skill based,
the circle or i think lights puzzle, which is super easy once you know the patterns.
and than there is... the random puzzle.
The other 2 puzzles are quite fun, but i can not stress enough how terrible the rng based puzzle is. And since you are timed, you have to spend minutes (if you are lucky) spamming the r button until you get a lucky combination.
This either wasn't tested or there was 0 regard for the player.
But you can, to some degree, ignore those (and you should).
Other than that, i really liked it!