The art is nice. Especially the little windows are very clever. You're clearly visually oriented.
But you need to improve how you give players feedback.
Although the art was cute, the playing experience for me was unpleasant because of UI faults. The player is left guessing what they should do. Sure, there's instructions, but the last time I read a manual was 20 years ago.
Instead, consider giving contextual instructions. Always show what the player can do at a given point. It felt very odd that the stove reacted as there was no indication that it could be interacted with.
You should consider general usability better. If you require players to read a manual outside the game, make it easy to jump in and out of the game. I found no way to get back to the game once I exited full screen and because the browser reacts to arrow keys, the game was unplayable from that point.
Also, moving diagonally should absolutely be implemented.