An interesting delve into a rare type of puzzle game.
Memory.exe has a lot in common with Antichamber, most prominently in the ability to place blocks, but also in the metroidvania aspect and minimalistic art style. However, Memory.exe is very much it's own thing, with an entirely different variety of puzzles, mechanics gained from upgrades, and a different take on what a Metroidvania puzzler is.
The puzzles in Memory.exe are unique in that they require the player to retain information from previous rooms. While not entirely unheard of, this is an uncommon choice due to the amount of thought that needs to be put into a puzzle to make it possible for a player to solve without a large headache. Often the solution is to have one puzzle per room, but only have them solvable with some upgrade earned later on. This game manages to avoid that trap, successfully implementing puzzles with different parts scattered about, missing the mark on only a couple puzzles; more specifically the "Rune of plenty" and elements puzzles.
The "Rune of plenty" puzzle was all but spelled out for the player. This is understandable considering it is the first puzzle most players will encounter, and is designed to teach the player a core mechanic of the game. However, it felt much too simple compared to the rest of the game, almost like it was forced in.
As for the elements puzzle, this has more to do with a lack of clarity in the instructions. It stated the elements needed to be done in sequence, but does not clarify that only one signal needs to be active for each element. This led to a lot of confusion, only compounded by how the "water" element is almost identical to the "earth" element.
However, other than those two puzzles, the puzzles are solid, with a good mix of exploration and problem-solving.
As for the music, while it is short and simple, the music is appropriate for the mood of the game, and does not get tiresome. Very well done.
An intriguing puzzler, with a lot of potential. While there are some problems, they do not detract too much from a session of peaceful gameplay and enjoyable brain teasers.
One other thing: Notes do not seem particularly necessary. While the information could get jumbled if the player is not careful, the puzzles themselves are fairly simple. This felt like a missed opportunity for some pretty complex puzzles, but is understandable considering this was for a game jam.