Hi, kris ! This is exactly the kind of feedback i was wanting to hear to improve the game. Sorry, but actually there is nothing planned for next missions ^_^' ... as i'm more programmer than game designer, so your suggestions have been very helpful for me. I'd like to implement most of them. I don't wanna make excuses, but as i have a regular job, i can work on it just gradually, so i think i'll try to start changing:

- Spaceship will have a shield bar

- I will remove the time limit

- Will remove the missions objectives like "destroy n enemy in n seconds"

- Implement wave of enemies

- Implement highscore

- Each time you hit the enemy, you receive some kind of "gold" that can be exchanged by new itens later. Can you help me to create these new itens ?

- I found some cool explosion effect (http://opengameart.org/content/more-explosions) by @StumpyStrust i'd like to try implement;

Well, when i get some improvements i'll back here.  Thanks again, kris, and please keep your feedback :)

Hi, kris ! Just now i have seen that you make awesome space backgrounds, it's really cool :) !

I was also looking for a explosion, these are awesome, thanks :) !

Hi, bart! Thanks :)