2D Game Polish & Bug Fix

I’ve got a finished-but-rough 2D game that needs a final round of polish before I can push it to players. The most urgent items are squashing the lingering bugs and smoothing out gameplay balance so difficulty ramps feel fair and the core loop remains engaging from start to finish... (Budget: €30 - €250 EUR, Jobs: 2D Game Art, Debugging, Game Design, Game Development, Game Optimization, Game Programming, Game Testing, Unity, Unity 3D)