Implement a Campaign Mode

[lukas-kirschner]

• [x] "Campaign" button on main menu
• [x] Multiple campaigns on a Campaign Selection Screen
• [x] Campaign Screen shows all maps in a campaign in order
• [x] Each map unlocks when finishing another map specified by a hash
• [x] Improve Map Highscore UI by showing best coins and moves result under each map in the list row
• [ ] Save texture pack with map and force the user to use a certain texture pack when playing the campaign map
• [x] Implement Message Tiles that show messages to the user when interacting ( see #79 )

To implement this feature, several other features need to be implemented:

• 10

• 7

• 5

[lukas-kirschner]

• [ ] Save the texture pack together with the map, override the global texture pack in Campaign mode with the one set inside the map

[lukas-kirschner]

Campaign mode should have a "Level Selector Maze" that unlocks with campaign progress and allows the player to choose a path / that branches in different directions to allow different campaign trails

Paths in the campaign trail should have labels that are shown to the user (like "Classic Psion 5mx levels", "Tutorial", "...")

The tutorial should be the first campaign trail branch and unlock more tutorials, like "Moving"->"Jumping"->"Ladders"->"Doors"->...

The campaign trail progress is saved in the highscores database per-player, the high score for each map is shown as usual

We need a struct "Game mode" that is either "Tutorial", "Campaign" or "Free Play". In Campaign mode, in the game over screen, the "back to map selection screen" button changes to "back to campaign trail"

There should be only one large campaign trail

The campaign trail should be different from the base game and unlock with game progress. We need a directed graph struct from which the trail should be generated and unlocked automatically with the game progress.

After unlocking one map, the player can see the next two map nodes, with the not unlocked one grayed out