That's great, I'm so glad you liked it! Particularly the gui, which was essentially just me and the line tool staring each other down for a few hours.
And yes, you can try as many times as you want - I myself have lost ignominiously too many times in these types of games, so I want to save others from my fate. The full game will have substantially more investigation, possibly even in the vn sections, so I hope you'll enjoy it when it's here. ^_^