Ballpoint Universe: Infinite is a very enjoyable shoot-em-up game that is set in a world where everything is a ink doodle. Because of the first few minutes, at first I thought it was a platformer but it's really a shooter with platform exploration.
Here are some areas that I thought could use some improvements
Controls- If you're on the PC, you will find that platforming with mouse is terrible. You're constantly moving in one direction and have to do fairly precise jumps. Switch to keyboard or gamepad if you have it. On the other hand the mouse is better for controlling the ship and feels very intuitive.
Item prices- Items are a bit too pricey that I didn't unlock most of them although to be fair, the game is easy enough to complete with the first few items you unlock. I suppose this encourages replayability but even at the end I had only unlocked 25% of the items in the shop.
Difficulty- This game on the whole is fairly easy as a shooter goes. Personally I'm terrible at SHUMPS so I found this game just about right on the difficulty but if you're a hard-core shooter fan you'll probably find this way to easy.
I enjoyed this game for what it is, an enjoyable "lite" shooter with a unique artstyle. I recommend you check it out. You might just be surprised.