Hello :) border flashing display when your ship take damage, it's normal. I don't know about Java emulator, I make tests on the original machine. The ship in the last preview is when you have finished the game, you can play it again with the Alcorak. Well I don't know about java emu but it doesn't work very well ? There are manyother emulator like WinAPE, ACEDL, SugarBox or RVM, you may try with these ones.