Hey there. Store is on the roadmap. Couldn't get it done within the week.
The game is endless. That's the lie.
There is a bug with gems now. As they play their SFX, the music ducks too much. Did you dislike the sound for generic coins too? Lemme know!
Difficulty balance: that's a tough one for sure... The enemies take ages to shoot (well, this enemy type anyway) intentionally. Later, when you reach 2000 ft or so, you will find yourself overwhelmed with crowd control. The game becomes much more strategic later, in terms of deciding whom to pick off and when.
Interesting comment about the graphics. Will talk with the artist, see if there's anything we can / should do about this.
Thanks for the useful feedback.