Oh, and I noticed a couple of bugs.
When I reached the first planet, I was in the middle of entering the Caesar code. Before I could press Enter, I arrived at the planet, but the Caesar panel stayed on the screen, so I couldn't really see the planet. 😄 I think you may have forgotten to hide that UI.
Also, at the very end, the game asks for my name and then displays a message addressing me. However, even though I entered my name, it didn't show up, it just left a blank space where my name should have been.