Pretty cool spin on a typing game, i like the time loop theme.
I also like the fact that instead of a classic typing game with limited time to type full words you made it a bit like a rhythm game where you just have to catch falling letters.
Challenge felt well balanced, i can't touchtype so this automatically adds a difficulty level to typing games for me but here it didn't feel too hard so that's neat :p
I think this is already mentioned on the game's page, but if i had to point out one small issue is that since the game is long having saves or checkpoints or anything that could help keep progress would help cause the game may be a bit long to complete in one go ( especially considering the acheivements XD)
Other than that it's pretty nice.
Well done :)