they did not go back on it intentionally if you paid any attention to what they've been doing. Itch will not approve his refund requests if they are over 90 days old.
I don't know about you, but I *never* saw an offer to refund just because it went to steam until people started complaining they didn't have the steam version here. I can't imagine how much this guy has stressed himself out over people by the hundreds hounding him over $3 when they have the option to play two fully developed games for a grand total of $6. Seriously, anyone complaining they need a refund or bashing on the creator for this need to touch some grass and live in reality again.