Pretty nice game! Only have some issues with having to keep the mouse button down to move. Doesn't make much sense to me, why not just have the ship follow the cursor? Or better even, control it with keyboard (or gamepad)?
Also found two bugs, one small, one big:
1. After completing the third quest, the banner does not change to 'completed' state. Only when going out of the Quests menu and back again, it changes to "new quests start in X".
2. Although I now have 8000+ coins, the upgrade of my wing still shows that I only have 10 coins, which was the case before my last run. It seems to not take into account my new amount of money.