wrong colors, sprite & text with artifacts. background has wrong colors & artifacts.

[Roberto Guardato]

Game has wrong colors, sprites and text with artifacts. Blocks used to compose background has false colours.
Scroll musica and game logic works as expected.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: frogatto 1.3.1+dfsg-2build5
ProcVersionSignature: Ubuntu 4.4.0-102.125-powerpc64-smp 4.4.98
Uname: Linux 4.4.0-102-powerpc64-smp ppc64
ApportVersion: 2.20.1-0ubuntu2.13
Architecture: powerpc
CurrentDesktop: LXDE
Date: Tue Nov 28 22:16:47 2017
ExecutablePath: /usr/lib/frogatto/game
InstallationDate: Installed on 2017-11-11 (17 days ago)
InstallationMedia: Lubuntu 16.04 LTS "Xenial Xerus" - Release powerpc (20160420.1)
ProcEnviron:
 LANGUAGE=it
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: frogatto
UpgradeStatus: Upgraded to xenial on 2017-11-21 (7 days ago)