Some suggestions ...
1) A downloadable version for offline play.
Nothing particularity special here - still runs in a web browser with the only difference being an internet connection is not required - maybe a self contained webpage could work ?
2) Option for a female gender alternate start .
This one might be a a bit more complex at a glance ...
Instead of using the male body use a female body - starts out identical aside from having a vagina instead of a penis and some of the screenshots seem to indicate that gender bender content may be present.
The opening changed to explain the only way the goo girl could save the player character by changing them into a woman with the option to be upset about it (goo girl is sad) or be thankful you are still alive (goo girl is happy).
Both choices lead to the same outcome as it only determines what flavor text is shown then the game advances as normal.
Special mechanics for the female alternate start could be having the player character look more girly as they get sissified (longer hair, breasts grow, etc) as a visual effect and attempts to become a male only work as a temporary fix (for one game day or one event for example).
Example visuals:
Small Breasts
Roughly an A cup, Could cross dress as a male. Starting size.
Medium Breasts
Roughly a B cup, Similar to a female athlete.
Large Breasts
Roughly a C cup but still smaller then other NPCs.
Hair length:
Short (starting 'male' length)
Medium (Shoulder length)
Long (past shoulders)
... but in practice it's 70% Alternate visuals, 20% flavor text and 10% mechanics modifications (gender chance effects are temporary, conditional change to player character art, etc).
Looks like an interesting concept so far - keep up the good work dev !