Wow, thank you! That is so kind, I'm flattered. I very happy you enjoyed the game. Thank you for the nice comment!
I honestly wasn't quite sure which category to pick, thanks for bringing it up. I'm not too familiar with the interactive fiction genre, but I thought that if I picked adventure, people might expect something like Zelda and be disappointed. 😅
Would you recommend me to switch the category to adventure?
The game is made in a little engine I've written myself. It's quite limited in capabilities but it works well for me and the kind of games I like to make. I like working with a simple system where I know how everything works. And I have tools for drawing graphics and creating audio directly in the engine, which means I don't have to switch to other programs and mess around with importing and exporting assets. Even if the tools are limited, I find that it helps me focus and not get lost in technical details.
SPOILER REPLY
Ah, I see what you mean. In my mind, the rule was "activate columns A & C and rows 2 & 3, but no other cells". So all the four cells A2, A3, C2 and C3 are valid, and the puzzle is complete once you've selected cells in both columns and both rows.
It might have been better to have a separate button for submitting the code when you think you've entered the correct one, instead of it validating automatically. That might avoid the confusion you had?
But I'm not quite happy with the puzzle overall, the rules are too vague. And I guess the fact that you found it easy while others found it hard is proof of that.
I want you to know how much I appreciate the feedback though. It's very helpful that you describe your thoughts while playing with such detail. I found it very enlightening. It's so different designing a puzzle from solving it, and it's invaluable to have someone describe how they experienced it.
Thank you for playing the game, and for the effort you put into your comment.