Nice entry! I included it in my compilation video series of all of the GBJam 5 games, if you'd like to take a look :)

Thanks to all of your encouragement comments. I was thinking to make a platformer game for a while. It's great to hear that you like the feel of game. Thanks again.

A nice platformer, great level design. Keep up the good work!

I'd suggest removing the two "surprise" spikes where my character is above here. They seem to be unnecessary, though I'm not sure if this is to prevent the player from going to the right (which they can do anyway once they land on the thinner platforms).

That aside, this was a really enjoyable, simple, but challenging platformer. I thought the moving platforms were interesting and the most memorable part of the game. The music is great; it's got an intensity perfect for the challenging rooms. The sound effects are also well done, love the walking and key collection sfx in particular. I look forward to seeing more levels; perhaps, in the future, you could also consider a map?

Nicely made game, graphics and audio were on point! I may have spent half of my playtime on getting from the second checkpoint to the third one: that precise jump between the two spikes was too hard for me... Speaking of checkpoints, their animation/sound effect felt just right. I would love to just run around in a room full of them just to activate them one by one ^^'

I've played too many games like this not to apreciate it. Really enjoyed it. Thanks for your work!

Very solid platformer, I love the functionality of the platforms, and how they move in particularly fun patterns.

Oh man this wasn't easy at all! I had frustration and fun, nice little game!