The game is short and quite simple, but I'm not sure it's possible to finish it.
The object "YE FLASK" allows you to get the "GOLDEN GOBLET" but also to get rid of the "GUARD DENNIS". Except that it is one or the other, but not both (unless there is another possibility).
There is a bug with 'GET ALL' that allows you to get the SODA and the POTION without paying!
Some default messages are missing to enrich the game a bit.