First off, thank you for doing this. I loved this map as a child and I'm sure I'll enjoy it even more all these years later once you finish it!

I just played my first game and it was really fun, but one problem with these games is some people don't know where to build, or where the enemies will spawn from so I would suggest adding some sort of indictor for where the mobs will spawn, if you've ever played the aRPG Van Helsing 2 they handle this very well by showing the path the mobs will travel, so even new players can work out where to build.

Minor bug: Some towers were showing the wrong gold cost for their higher tier, for example arrow tower shows 250g instead of 5000g.

Keep up the good work, I'm sure it'll be great.