Ring all of the bells in each level to progress -- but be careful not to stand too close!
This cart is my contribution to the Advent Calendar 2018. I think it turned out well as a wee concept game, but it's really the equivalent of a hastily wrapped box of chocolates purchased at 3am on Christmas morning from the closest gas station, compared with the amazing work that can be found in the calendar. Try out the other 24 games here if you haven't already: Advent Calendar Thread.
Thanks to everyone for the chance to join, and in particular @Bigaston for putting the whole thing together, and @2darray for making the rad menu cart and updating with work-arounds for the janky BBS. Making PICO-8 carts myself often gets pushed aside by more urgent things, and I really enjoyed the chance to make something for kicks again. I'm looking forward to more carts and collaborations next year!