I just backed this at the low end ($5/€4.8/C$6.45/£4.8), bein' the big spender I am. 😄 The Campaign had a bundle with which you could add other Dr. Finn games, all of which it would seem you'd get this Summer, 'cause they've all been previously published.
Image Source: BGG
Image Source: Kickstarter
I think you did the right thing, picking the $5 pledge level over the $80 one. 👍🏻