Good Start, but need some polishing
issues and suggestions-
1 dragon lust potion is either busted or needs rebalancing - the increased rate of arousal drain can easily soft lock early and the second one kills a run.
2 game time - either a save system or rate of game progression needs changing, 3-5 hours to the second dragon lust potion with more potential stuff further along had it not killed the run means game currently takes too long for a game without saves.
3 two bits for art change first the art for default pose is visible during animations, and second if an animation is added for kobold working on the dragons ass the one working the dragons balls may need to be moved or a transparency toggle
4 haven't replicated it but a bug cause a second dildo purchase for 900 (I think occurs if dildo bought before vibrator.)
5 the sell price is currently text (sell price) rather than a visible value.
6 I recommend adding a windowed mode.
Over all I hope to see more, this game holds promise.