[Patch note: Build Release 2] Small bug fix and keyboard control improvements

Hellsinker.

A legendary SHMUP influential to the best makers in the genre, Hellsinker is now available on steam in its most advanced form! Gameplay, story, graphics, and even music all united into one cohesive and highly dimensional Shoot-em-up!

- Fixed key mapping was not working with Xinput Controller connected. - Assigned sift and ctrl key to button 13 and 14. - Fixed layouts of staff credit.