Got a surprising amount of potential, but there's a plethora of issues.
Chief amongst them, a total lack of an options menu. My Monitor is apparently fairly small, so the game window loads up way too crunched, halving the buttons in half, and making it impossible to play the GTS Simulator and Photo Mode.
There's also the factor of the sprint speed in the primary mode being far too slow, and far too small. Not to mention the Giantess being simply too easy to dodge, even in the dark mode. Personally, I recommend increasing their speed and view range.
Though, I'm a modeler, not a programmer, so hey, do what you can and want to.