This is the most impressive Jam Metroidvania I have ever seen in my life. It took me about 2 hours to beat the game, which is the longest I have spent on a Jam game basically ever. :) The Bennet-Foddy / Metroidvania combo really works. Very well done, and a cool aesthetic as well.
A few pieces of advice to slightly improve a great game:
1. Faster movement on sand would be nice.
2. The cooldown on your pips should probably be reduced or taken out. I get that you have to restrict being able to infinitely jump in the air, but maybe having all the pips reload instantly upon touching the ground or something of that nature would eliminate the waiting factor while platforming.
Overall, great job! A 3D Metroidvania is extremely ambitious for a Jam Game and this turned out great!!