Natsuyume Nagisa Demo doesn't work

[eglaysher]

As reported by "ayumu":

Using the 0.12 release on Linux Mint, Natsuyume Nagisa is unplayable due to something funky with the opening butterfly animation - nothing happens and the logo just appears in its final position on a white screen. The buttons needed to start the game won't show up (they don't work even if you click or hover around where they should be). The following pops up on the console:

(SEEN1)(Line 24)[grpBuffer]: Invalid DC number in SDLGrpahicsSystem::allocate_dc
Doesn't deal with fade_in properly yet...

I tried the full version, but the demo version on the Saga Planets website uses the same animation if you're willing to download it and take a look at it.