Geometry Clash

The simplicity and clean UI make the game very approachable to all. I really enjoy the miscellaneous features within the game and the color selection of the bullets. One suggestion on the topic of visibility is to perhaps make the ship darker, or give the player the option to set the color of the ship. Perhaps implementing this for enemy ships as well could be beneficial just to ensure maximum accessibility.

Additionally, having short little descriptions for each ability in the shop could be nice just to know what it is exactly that you're purchasing prior to buying it. Apart from that thought, the game looks very well done.

This game reminds me of a game called Psyvariar. The mechanism is quite the same. However, your game has clearer graphics and better UI. The shop system is quite amazing and also I think it is the best part in this game. When players click the upgrade, it has smooth feedback and the effect in the game is quite clear. Added with the saving and level choosing, I think the game is quite complete and well designed. 

I think what you can improve in the future is, if possible, there can be more planes to choose and even abilities for different planes. But overall, it is a very well done game.