Wow, I can tell there was a look of work put into this! The interface looks very clean and professional, with some nice 2d art. The 2.5 style of the gameplay also looks great, with some cool character models and animation. The game controls fairly well, and having several characters + a bunch of items is quite impressive. The music and sound effects are  good, though it feels like the game is missing some sound effects.

Unfortunately, there are several aspects that are a bit broken. It seems the intent was to unlock Felix by beating the evil Felix boss, but instead you just start with him. Speaking of bosses, neither of them seemed to do much and I could just wail on them. The save system is also janky: It saves your location and inventory, but event triggers (e.g. for the bosses) are all reset.

That said, there seems to be a lot of potential here. It would be cool seeing what more you could add to the game to flesh it out.