Not bad, maybe a bit too hyped tho
This is probably the best thing your duo has made thus far and for that kudos. Its good you are breaking into much larger projects than the low scale ones. On to the Good / Bad / Overall review:
Good: I like the color palette, was worried that it felt too monochrome but it actually worked out and sort of gave it a style of its own. The simple palette, matches the simple sprites and concept and you really were consistent with being simple and thats cool that you kept sight of that in most aspects of the game.
Also good: I liked the death concept, reminded me of Prey and other games that did something beyond a game over screen.
I dont like how long it takes to kill that thing tho.. it totally kills the buzz from the main game. In Prey, the game over game was simple and quick you didnt spend like 10 mins 'trying' to get back into the game. If newgrounds was a gaming system id have pushed the reset button and just did it over. It felt like the opportunities to hurt that boss were way too rare.
Need to work on: Performance, the game is so hard to play when its not running well, even at the lowest graphic setting it just 'feels' slow. I hope that you didnt design the game to be played at the lowest setting.. its sort of a crap shot if you did because the typography looks terrible at the lowest setting. sorry im a big typography buff.
I think one of the major drawbacks of this game is that you worked so hard to keep things simple and then you cluttered it with bells and whistles so much so that it affected the performance of the game. Things like heavy particle effects, transparencies, masks and all that while visually beautiful really cut into the enjoyability of a game that runs well. This was one of the hardest lessons for me to learn in the making of NG rumble and that being to think like a game animator and not like a traditional animator..
Im not sure if its because my machine has processing issues but edward feels sluggish.. especially in the air. He doesnt feel bouncy or agile at all. and the fact that he becomes more agile when you are moving faster also made it annoying.. it almost felt like you purposely made him sluggish unless i was at full speed. If so i ask why? theres some parts where i wanted that percision and nimbleness.
Overall: I think its a cool attempt, the visual presentation is cool and it had some neat concepts.. i just had a hard time interacting with it because it felt like the interaction was always 2 steps behind my needs.