This is a twin stick shooter. Maneuver in a way so that the aliens never touch you. Every 3rd wave, crush them all.
In the overload wave, I would have liked to see an intense opposition to match the intense power wielded. Feels like a wasted opportunity.
The lack of sound tells me your woes as a solo dev. It can be hard sometimes, of that I see no doubt.
A healthy entry as a newcomer, and you'll grow as you continue to jam. It may be wise to team up in the future to fill the gaps you have at the moment in order to grow in your specialty, rather than being forced to become a generalist.