The interface was well set out with clear easy to understand navigation however it would have been a better experience for the user if the game started at the home page to provide the user with the name of the game, a clear sense of where they were in the game and it's purpose.
Jack's Rocket screen
The proximity of the control buttons on the rocket screen helped to effectively draw the user's eye to them and the button text gave the user a clear understanding of what each button would do. The Up and Down buttons only moved the rocket very minutely so there was little visual feedback that the rocket was actually moving which could lead to confusion that the buttons did not work if they were pressed first.
When the rocket was sent to orbit it completely moved off the screen so could be confusing to the user wondering where it went or how to get it back.
The button text alignment and font were easy to read and the contrast of dark grey against the red button was effective on idle, however the button colours when highlighted or pressed became very dark making the text hard to read causing accessibility issues for users with poor vision. The use of the red buttons complemented the red rocket and was visually pleasing.
Jack's Home screen
The visual design of the home page immedicately gave the user the space theme and the bright yellow contrasted very well against the dark background.
The use of both text and images on the menu buttons was great design allowing for users with low reading skiills to understand what they might expect when they pressed a button.
The use of the square font for the button text fitted with the space theme. Once again the use of a darker text colour for the highlighted button was hard to read.
Overall, a great design Jack!