Great work.
Only played for a shot time but...
Could use a mini-map or level map.
Level design on first level is very bland, I think this needs more of a platformy style with maybe floating islands or gorges, fissures, platforms and jumps. Which opens the way for a jetpack and other powerups e.g. teleporter, seed gun, robot harvesters, sensors and turrets and more aggressive enemies.
Is the first level too big and would a smaller first level with more complex and challenging levels later on work way better.
So much potential hope you work on this some more and release it. Good Luck.