Thanks for playing! Maybe I should add a more clear "this is the point of no return" before the final boss, if I can't figure out a way to make the credits lead back into the game. I agree saving would be very nice, but I dreaded adding it because of the complexity / fucked up way I developed the game (originally, it was a game where you were on a 10x10 grid and would press a button to find a mushroom, and it morphed into this zelda-like thing) Excuses, I know.
Also you did find dark blorb at the right time, the portal unlocks once you have 30 mushrooms--but that goal is probably too easy, huh. I was trying to balance making it easy to get to the goal for demo day with making the player explore most of the world. Frankly, I was worried about people getting filtered by the dark forest and quitting before seeing the ending, but maybe I could raise the goal a little bit.
The shop is very much a vestigial thing--previously, you bought the axe and pickaxe, and you sold mushrooms instead of putting them in the museum. My current VISION is for the shop to have cool items you can buy for gold, like hats and different colors for blorb, but I didn't get around to it.