It's initially fun, but once the novelty wears off, the gameplay doesn't have enough going on for any staying power (enemy variety devolves into colored variants than anything new by Chapter 2, the melee is super basic, level design is whatever with very samey looking environments). The levels in the third chapter in particular decide to increase the enemy count and drag out the levels long enough that I just wanted it to be over sooner than later for how mundane it got.

Also I have no clue what the "001 Engine" is, but I hope to never have the displeasure of playing a game with it again. This is probably worse than any low effort "le boomer shooter" game on Unity when it comes to poor performance and taking 15+ seconds for something as basic as a "quicksave" on a M.2 SSD.