Initial snap packaging.

snap/gui/aaaaxy.desktop

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+[Desktop Entry]
+Name=AAAAXY
+Comment=A nonlinear puzzle platformer taking place in non-Euclidean geometry.
+Exec=aaaaxy
+Icon=${SNAP}/meta/gui/aaaaxy.png
+Terminal=false
+Type=Application
+Categories=Game;ActionGame;
+StartupNotify=true

snap/snapcraft.yaml

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+name: aaaaxy
+base: core20
+version: git
+summary: A nonlinear puzzle platformer taking place in non-Euclidean geometry.
+description: |
+  AAAAXY is a nonlinear puzzle platformer taking place in non-Euclidean
+  geometry.
+
+  Although your general goal is reaching the surprising end of the game,
+  you are encouraged to set your own goals while playing. Exploration will
+  be rewarded, and secrets await you!
+
+  So jump and run around, and enjoy losing your sense of orientation in
+  this World of Wicked Weirdness. Find out what Van Vlijmen will make you
+  do. Pick a path, get inside a Klein Bottle, recognize some memes, and by
+  all means: don't look up.
+
+grade: devel
+confinement: strict
+
+architectures:
+  - build-on: [amd64]
+
+parts:
+  desktop-glib-only:
+    source: https://github.com/ubuntu/snapcraft-desktop-helpers.git
+    source-subdir: glib-only
+    plugin: make
+    build-packages:
+      - libglib2.0-dev
+    stage-packages:
+      - libglib2.0-bin
+  part-aaaaxy:
+    after:
+      - desktop-glib-only
+    plugin: go
+    go-channel: stable
+    override-build: |
+      make BINARY="${SNAPCRAFT_PART_INSTALL}/bin/aaaaxy" BUILDTYPE=release
+    source: .
+    source-type: git
+    build-packages:
+      - graphviz
+      - imagemagick
+      - libasound2-dev
+      - libgl-dev
+      - libxcursor-dev
+      - libxi-dev
+      - libxinerama-dev
+      - libxrandr-dev
+      - libxxf86vm-dev
+      - pkgconf
+    stage-packages:
+      - libasound2
+      - libgl1
+      - libglu1-mesa
+      - libglvnd0
+      - libglx0
+      - libx11-6
+      - libxau6
+      - libxcb1
+      - libxdmcp6
+
+apps:
+  aaaaxy:
+    command: bin/desktop-launch $SNAP/bin/aaaaxy
+    plugs:
+      - alsa
+      - opengl
+      - x11