The game looks pretty cool-- the cogs are such a vibe, the areas flow nicely. The first boss (I couldn't make it any further) has a sick design.
Ultimately the section leading up to the boss is a bit too uneventful to want to repeat (like when they circle around and shoot, they always shoot in the same place so you can just stay inbetween the dangerous spots and just keep firing) then the boss is too difficult (the pink projectiles are hard to dodge, often the main character mech gets in the way so you cant see properly). I also think some visual reaction to landing your hits would do a lot for the game.
Anyway I love the design of the main mech, from behind at least it reminds me a lot of the Rick Dias from Z Gundam.