Nobody gets that it's an introductory episode (their own words). It's not supposed to have a lot in it. Whether the decision to do it this way was smart or not is a separate issue, but we should be taking it as it was meant to be presented. All the future episodes are apparently supposed to be much longer and with a decent amount of puzzles.
"Booyah! Look out, LeChuck! Here comes Guybrush Threepwood's glowing sword of hot monkey vengeance!"
-Guybrush Threepwood, Tales of Monkey Island