For a giant mech movement feels slow, I barely could dodge any attack. Simple juicing mechanics like a light screen-shake or rubble when stomping would have already made a huge difference.
The skeleton is there for a fun survivor, you need to look into improving the game feel. But in it's current state I didn't really see how it fit the theme
I do love the title screen & death animation, also got some great art assets in there. Make the buttons a bit more stylized and you have that part polished down. :D