A couple suggestions from me:
1: Correct me if I'm wrong, but will the Shield powerup not show up if you already have a shield active? Maybe do something like this with the shotgun, or have the shotgun powerup fill your ammo.
Er...actually, that's it. I loved the game and I look forward to updates and a sequel.
Thank you for this tutorial. The only programming I'm proficient in is an abbreviated version of C/C++ that's for a specific game, so keep the tutorials coming!
Although the graphics could have used some work, the story of this game is what really appealed to me. Although the "save the princess" storyline was rather cliché, the execution was very well done, and complimented the gameplay nicely. One thing though: It was rather short, and a sequel would be nice. I look forward to additional titles from you, and I have been keeping up with the "Unlock" series for quite some time now.
Very nice, I liked it. 4/5, maybe increase the robot's speed to make things go a little faster, or add a fast forward button. I like the music as well.
thanks!