Shellbound mobile controls, tightened up.
More reliable building and touch controls in multiplayer, with a clearer playfield.

- Fixed: Build while on the move. Building and upgrading now keep the correct selection when you are also using the movement stick.
- Fixed: Let go, stop attacking. Touch controls now release cleanly when a touch is interrupted, and building does not leave movement stuck.
- Updated: More room for the action. Removed the player card row above the Shellbound playfield. Leaving a party now returns to the homepage.