Minor fixes - Fixed fatal crash and small fry graphics

Made a quick update after discovering a fatal game freeze caused by using while loops for summoning fish combatants. Therefore I streamlined the code to not have while loops while still allowing fish to spawn at empty spots or random spot when all occupied.

Additionally, I have changed the graphics of the small fries to be distinguish between opponents and players.

Here is short video with some minor changes.

Plenty of more tweaks to go until I call this a free MVP (minimum viable product)