I enjoyed every second of the game. The controls are very simple (one key) but the level design is great and made use of everything that's available. There are not a lot of games featuring Pterodactyl, pufferfish, text boxes and time travel at it's core. What more could I ask for?
I'm not sure about other browsers, but Google chrome seems to be flagging the downloaded file as malicious. You might want to find ways to prevent that.
Great job on the jam!