Can I make my hotspots smaller, bigger or animated?

Yes, you can do it for every hotspot in the tour on the Design tab, in the Hotspots setup panel (Advanced view):

• Size: Look tab > card Style > Size: Small, Standard or Large. However small the badge is drawn, it stays at least 44 pixels to tap.
• Animation: Motion tab > card Interaction > Idle animation: None, Attention ring, Gentle float or Slow breathe. The hotspots move out of step, and one stops while its popup is open.

Hotspots setup settings has the rest, such as the hover effect and the entrance animation.