I really enjoyed the game. There were a few bugs I ran into along the way that I thought I ought to mention, nothing show stopping but your game would be better still if they could be fixed. I've not tried the Windows version so it may only be on real hardware - these were all playing the DOS version on a Tandy 1000TX:-

• If you restore your game while the intro is playing, the text prompt never appears so you can't do anything. I had to skip the intro first.
• The score at the top of the screen has a habit of disappearing at times. Especially if something falls from the top of the screen where it wipes it out. My final score wasn't displayed on the last screen either.
• The line of text you see to type exit to leave the screen when you have a closeup (e.g. the crystal with the scholar trapped in it) doesn't go away when you do exit. 
• The keyboard controls are a bit dodgy when changing direction. E.g. I press 4 to walk left, then swap to 7 to go diagonal left/up. It wouldn't necessarily pick the change up. I could end up stopped or only moving up instead unless I released and pressed the 7 key again.