Input Handling.

[A-rms]

Input handling issue:
Whereas input handling won't have anything to do with updating its position (at least not directly). Rather, it can update the member variable for speed (and/or acceleration) - OR, update flags for something like a bool m_isMovingLeft; - which might be better since we don't want them to actually start moving left if that flag is true, but some other bool isTouchingGround; is false due to being in midair (or, we could alter their speed by a reduced amount if in midair). But we'd add checks for those in tick(dt) when deciding if the players speed (and/or acceleration) should actually get altered.

[Rinzii]

On hold till further discussion is finished in discord.