We are so glad you liked it! We didn't have the time to add a level selector but if you feel like trying the game again, in that level there is a person hidden inside the corn field, you just have to spot him with the glove camera :D There are up to 13 levels with more explosions and fun stuff.
We will add the level selector in the future. It's true that if you hit the exit button by mistake you can loose all progress.
Thanks for the feedback!