-I'm trying to play, but the mouse is driving me nuts. It seems to gain increased latency like an awful software cursor(more than half a second behind my mouse) over the course of couple minutes(but it feels bad after only 30 seconds), then semi-randomly resets to near native. I just notice now that it also resets when I drag the window bar around. So with that I can actually play now, but preferably you would add an option to use hardware cursor in the options. I am using modern AMD cpu gpu on Win10.
-Not sure if it's a font issue, but sometimes during the countdown, the timer number display shifts left and right for a frame on almost every second or minute boundary.
-Took about 2-4 tries to get the first chroma, my years of rhythm game experience probably helping. Which makes me wonder, if you should add an audio calibration so the countdown sfx can be better synced with player input, since we're talking about frameish perfect tricks here.
-Cute, I like having to stamp the achievements manually. Maybe being a bit silly, but it's weird to have an ink stamp for each one, would make more sense if it were printed stickers or something. Albeit I don't know stamps maybe it's dirt cheap either way.
-Countdown volume isn't changing with the options. In fact it plays even if you mute everything.
-Trying to get chroma Schroomth, much harder than the other one with like 20+ attempts. Oh wait nvm I just forgot about the -40 thing, woops! Got it first try after that (⌐■_■). I also then got the chameleon guy first try. Though it was a bit tense since the wait time was over a minute. Hopefully you ensure the RNG doesn't make it so you have to wait more than 3 minutes or something.
-If you press a button with the mouse and hold it down, the sfx for the press will repeat ad nauseum exponentially until it's playing every frame. Oh nvm I guess it's intended to button repeat fast to speed things up. But, then why doesn't it repeat(nor play the press sfx) when holding with the keyboard keys? ie spacebar.
-Primeape is giving me troubles for real, and the wait time makes it hard to stay motivated. I did the math on the encounter I got and was only 2 frames late. Sucks to suck I guess. I almost want a method to skip ahead time so it's less of a slog, but I guess it's the point? It depends how often you need to do this waiting, and if it's worth dissuading some people from doing the more advanced tricks you want them to find.
-I give up and start battling the beach bros, and also get the gacha stamp. I beat all but the last beach guy, so guess I'm back to trying to get the primeape... eventually I get tired and read some of the comments and see that apparently there's a delay to the primeape battle start? I just so happened to see a monster 2 frames later with the same stats as the one I caught, and I only see it again at +22 frames(754chroma -> 776), so I guess that's the real offset I'm working at? What a great contrivance to convince me the cutscene wasn't adding to the rand function; I thought it was instant like the other static encounter.
-I proceed to get the chroma first try (⌐■_■)(⌐■_■). But really it stinks that that happened. idk how you can prevent that sort of random troll, unless clarifying that cutscenes always add to the rand function or something. Assuming I didn't gloss over something like that. I then got the rod and got the last chroma. Note that the achievement pops up before the wait for the success of copying finished. May be 'bug' or not.
-You can still use out of combat moves like pheromone when the mon is dead.
-I was getting extra mons for the sake of unlocking equipment and realized I maybe messed up by not copying more than one of the chroma primeape? Maybe I can copy the boss's one? Though it makes me wonder why I can't copy my own mons.
-Even though the option exists, I can't actually equip items from the Team menu, only the Items and Computer menu.
-Every now and then, pressing menu doesn't open the menu when it should. It seems to happen after events that start without your input, like the text of pheromone when used not in grass, or after a respawn after being beat. However, this is only the case if you proceed the last dialogue with Action not Menu. Then once you regain control you press menu and it does nothing the first time. See this:

-I try a couple more times fighting the last beach bro but I'm getting a bit tired, I don't really like pokeman to begin with. Suppose I could do some duplication to stack equipment. Think I'll leave it there though. Didn't look for any secrets, maybe I'll try another day assuming saves are a thing.
So overall a cool puzzle / glitch showcase type game. Though, the time to satisfaction ratio felt lacking. Doesn't help you can easily waste a bunch of time without knowing you're barking up the wrong tree. Since this is like a puzzle game having all the puzzles available at once, it can be both overwhelming and directionless. So if you make details revealed over time it may help the surprise and pacing. Though in that regard, it's unlike puzzle games because instead of having to figure out the rules you skip to hints that just tell you what to do. So idk it may be impossible to make it really great while not driving players crazy.
Keep up the good work.