Hi lugum!
Having a free day or two at some time in the future is definitely a possibility, but certainly not soon. If you follow me on Itch you'll find out straight away about special offers and whatnot.
If you haven't already played it, don't forget there is a completely free Captain Disaster game available in addition to Stomping Boots - https://captaind.itch.io/captain-disaster-in-the-dark-side-of-the-moon
Thanks for your interest in the game and I certainly can sympathise with the lack of money, but for now I am planning to leave the game at full price for a while.