Hi, thank you for your feedback.
Regarding the inability to shoot after restarting, that was definitely a bug and it is fixed in the latest build of the game, which you can download now.
For the second bug (the one where you died and started in another level), can you tell us something more about what happened? (for example, in which level you were before dying and where in that level, the cause of your death etc.) This would really help us find out the cause of the bug.