Make sure to use ScummVM to play it! DOSBox is a great way to play a lot of classic PC games but ScummVM is better for any games it supports. This is because ScummVM is a modern engine that runs old adventure games which are written as scripts that run on an interpreter. This beats running an old engine on DOS through DOSBox!

For the game itself I recommend the Internet archive! You can find it as part of the ExoDOS collection or standalone!