Deathplane Demo Update 0.0.4 Release

[p]PATCH NOTES (Ver 0.0.4)[/p][p]"Coins" are now killed by the deathplane.[/p][p]A few minor changes to Level 1-3 and Level 1-2.[/p][p]Level 1-3 now introduces the concept of doors better.[/p][p]The key is now "killed" by the deathplane.[/p][p]Worked on a better fix for PlayStation controllers.[/p][p]Enemies now have a special visual and audio effect when killed by the deathplane.[/p][p]A few minor optimization improvements.[/p][p]Various other bugfixes.[/p]