One major, two minor
I've encountered three glitches with the game so far:
1. The game won't install, it just freezes when I try to install it.
2. On the level "Smugglers Den", the beam of light is supposed to knock down two platforms when it enters the underground cave. These platforms didn't drop so the level had to be restarted.
3. On the level "Fountain of Youth", I have no way of getting the mermaid from the far right of the level to the water spout in the upper left.