The tutorial is a nightmare. No one who will lay and eye on this game will ever go through the tutorial in its present state. It contains waaay to much text and needs to be greatly toned down. The game presents itself as a "fun and easy to use pick and play experience" but its not, much thanks to the extreme tutorial with more text than the first 5 minutes of a Japanese rpg of your own choice. But also to this, are the control issues. I can’t control this game at all, the control is constantly "inverted" and the character in a result of this is all over the place. The targeting system that you call "zoom" needs some guidelines in the interface that makes you go "aha, I’m going in that direction", a first step in doing this is for example, make the zoom feature a fully working "targeting system" instead.
Besides the tutorial and the control issues, the heartbeat sound sounds awful and takes way too much space in the game. The sound experience is great in general, pretty much like the games graphics, but the heartbeat makes it just frustrating to play the game. And it doesn’t deliver the "stress factor" like it should be.

Overall it’s a great looking/sounding game. But the gameplay is simply frustrating and shity.

The concept is looking good overall but as previously mentioned you have a serious problem regarding the control of the character.

What I would suggest as improvement would first of all be to separate camera movements and the movement of the character. Very often you happened to miss an item you were running for due to the camera switching angle and your char turning 90 degrees more than intended.

Since moving between planets is so central in your concept you need to give it some extra attention. Right now, you have no idea wether the character was actually moving towards the planet you were aiming for, moving in the complete other direction, or moving towards the sun. The dive concept sounds like it could work, if only I knew what I was diving for. Far too often you happen to dive into the sun because you have no idea of knowing your relative orientation. I think you'd do alot better with some sort of close chase-cam free form movement when travelling through space (even a first person view for spacemovement might work).

You should consider lowering the shininess on the planets, atleast when seen from a distance. Right now you tend to get the marching white dots all the time due to too many small highlights and it ruins the otherwise good looking graphics of the planet.