v0.4.0-alpha

What's Changed

• Hide pause menu exit button for HTML5 too by @exocetfalling in #14
• Add real terrain by @exocetfalling in #16
• Add battery consumption by @exocetfalling in #20
• Fix non normalised lateral movement by @exocetfalling in #21
• Add sound by @exocetfalling in #22
• Refactor settings UI by @exocetfalling in #24
• Add missions, or at least the skeleton for them by @exocetfalling in #25

Full Changelog: v0.3.0...v0.4.0-alpha