I think Armorgames just gave you the best description of the game: "Lacks compelling gameplay". Although I think that graphics and art style plays an equal part in what makes a game enjoyable to play, it is the gameplay and mechanics than makes people want to play more/longer. I tried to play your game, but lost interest in less than 10 seconds (sorry). The game does not make it clear on what I have to do or what all the different parts of the game are for. When I saw the words "dopamine emitter", "glucose" and other stuff I can't even remember; I instinctively hit the x button on my browser. It doesn't feel like a video game at all. I'm sorry for being blunt but you've put a lot of energy into it, and you deserve an honest feedback. Have you done any user testing/user experience before you committed yourself into making the game? I think that you should have done a simple prototype, and let people play it. Then you'll be able to judge if people will actually enjoy playing the game. Good luck and I hope you succeed in your next game.
These are just my own opinion. Maybe I didn't give your game enough time or maybe your game just isn't my cup of tea. Just keep making games and don't forget to let other people test your game during and after developing it.
[Edit]
I had another go at playing your game. I've managed to finish the first level and it's actually quite alright. But still didn't get the feeling that I have to beat the first level to get on to the next one.