Tester Phase One is a fast-paced vertical shooter created by the developer of Made in Wired, where the player's ship is equipped with a standard issue primary firing weapon and a special reflect attack used to deflect projectiles fired by enemy ships. The reflect mode can be activated pressing the X key, although once the full charge is depleted there is a small delay before it can be used again.

Your progress is only saved after every tenth level, with all previously attempted stages available for selection from the main menu. (source: the2bears)

Name: Tester Phase One
Developer: Isshiki
Category: Shooter
Type: Freeware
Size: 2MB

Related:
Tester Phase One gameplay video