Thank you so much! Thrilled that you had a good time :)
The feedback is much appreciated. The letter hunting was definitely a bit of a conceptual shortcut for me to be able to easily compartmentalise each individual puzzle during development. For the post-jam version, I think I'll be adding a few more puzzles that'll reuse the existing items in different ways, which will hopefully make it feel a bit more satisfying. Particularly, I had a lot more plans for the final "boss fight" that would get you to think outside of the box to use all the different tools you've acquired in the game so far to defeat HELP BOT.
Anyway glad that you had a bit of fun. Your game is already on my list of ones to play so I'm looking forward to checking it out! :)