This is very creative for having such a simple and common general idea. Thousands of platformer games have been made, yet this one still stands out. The way the player must interact with blocks is unique to this game. In most games, blocks are just moved by pushing them. I think forcing the player to think with their head, pun intended, is an excellent addition and allowed for some very interesting levels to be made. Sixty levels (plus the lost ones) is more than most games of this kind, but I never did get bored, so this is fine.
It is a bit of a shame that so few people had the chance to play the lost levels. I mean, you did an especially good job on those <spoiler> the changed gravity mechanics were a welcome addition, as by that point the standard mechanics were getting old. Forcing the player to refresh the page to pass certain levels is odd, not out of place with the rest of the game.</spoiler>
The art is simplistic, and the story is non-existent, but honestly, I think this may have been for the better. It might feel a little weird to have some beautifully designed, anti-pun ant-ended again. The meaninglessness of playing the game fits well with the general strange elements of design. Truthfully, I rarely actually listen to the soundtracks of the games I play on NG. This one was no exception, but just listening to it now, I think it was a poor choice. The game's not <b>that</b> exciting. I'm glad I listened to some lo-fi hip hop on YouTube instead.
The medal requirements are pretty well chosen, with a mix of progress based medals, challenge-based medals, and grind based medals. Clearing the red stuff felt decent, even though it looked nothing like mold. I personally like the idea of splitting up no-death achievements. It makes them easier, but still pretty difficult to obtain. The "Beat x number of total levels" medals were both achieved while attempting to get other medals, and though I did have to grind a bit, it was easy to die a lot very quickly once you reach level 59, so dying one thousand times was very attainable. The medal "No Death 6" is the only one that I have yet to achieve, but plan to in the future. As for the "Play Fridge Runner X Times" medals, these I have no idea how to obtain. The "Lost Levels" badge does seem to be broken for everyone, so if you ever read this, please do remove it.
Ultimately, this is very good for a game as simplistic as it is, but I would be rather pleased to know how to unlock the medals for playing Fridge Runner a certain number of times.