Not bad
Not bad, easy to beat once all upgrades were purchased. Controls should be split so that up is separate from strafe. In terms of the increase in gravity towards the surface, this is accurate. In the center of a mass you would feel no gravity but the more the imbalance of mass around you becomes by heading towards the surface the greater the pull back to the center becomes, hence the increase. Once you clear the object and increase distance, gravity weakens again.