Yeah, I had the same problem, where I have to re-flash another game using the computer because it doesn't recognize the loader.
This game looks really great, and the controls feel great too. Really nice presentation overall.
I'm not a huge fan of the level design though. Several of the early levels require long, repetitive sequences of timed button presses, and the limited number of lives means that getting stuck on later levels requires depleting the entirety of the repetitive earlier levels over and over. Why even have a lives system? It seems like there should be no problem to let the player retry a puzzle an unlimited number of times. Perhaps a puzzle select menu after having solved the previous puzzles would be nice, as well.
I also feel like levels like 2 and 3 could perhaps be shrunk down. There's a lot of tiles that must be crossed that don't have any "puzzle" to them. I feel like shrinking the puzzles could make them feel more focused and less like they're making you do unnecessary things.
Just my two cents. The game already feels great, so these are just things I feel would improve the experience and keep people coming back to it.