Hi VincentSIFT,
My apologies, it seems like you had a rough time. Talking to Squandrick is optional, so don't worry you didn't miss anything. The not being able to jump temporary after dialogue appears to be an odd intermittent bug tied to Taxxie, I uploaded another version with the hopeful fix. There is only three power-ups so you got them all. I included a text in the final cutscene that gives more direction on what to do next. Truthfully, I didn't have time to finish the game, so after the final cutscene you didn't really miss anything thereafter, so consider that a win. Thank you for the feedback!
UPDATE: the bug with the dialogue should be fixed in the most recent update. The issue was cause by a bad logic when speaking with Taxxie where the player would trigger to enter dialogue with Taxxie at in invalid time, making them stuck in dialogue mode, locking them out from certain inputs. If you are playing an older version, the issue is caused when speaking to Taxxie when they are turning back to the straw. To fix the player input you can speak to Taxxie again, but do no mash the interact button after the final dialogue. Again, this is fixed in the latest version!