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Unfortunately, I couldn't complete your map because, firstly, I didn't collect the second Horn of Plenty (needed to unlock the pink castle). The Cloak of Endless Crystals was lost along with one of the initial enemies when the week expired. And secondly, the flying snakes grew in the only landing spot near the pink castle, and they can't be killed from the sea...
This is disappointing because the idea is good, and I enjoyed playing one of your other maps (the "butterfly effect").
Hooray! I discovered a backup exit portal (if you block one exit on the surface, you can get underground through the turquoise entrance portal). I found the Grail and killed all the enemies, scoring a total of 484 points.