This Seeking Tech guide will explain how you can beat the Thrust or Bust level of Astro Bot.
Use the following video as a reference:
For the first section, wait until the bells attack and then jump to a safe spot. You then need to use your power-up to defeat them.
Afterwards, wait for an opening to use the launch pad.
Quickly get rid of the spike enemy and then jump over the first honey comb.
For the second honey comb, try to land in the middle when it is safe and then jump again to avoid the stings.
For the next section, jump when the log just stops spinning and then use your power-up to get rid of the slime. You can then carefully make your way across.
For the spinning vines, look for an opening and then run counterclockwise.
You then need to quickly make your way across the breakable platform and then burst through to avoid the vines.
Next, attack the slime quickly before he can shoot.
You then need to quickly move through the next section again. Afterwards, move forward and do a spin attack to get rid of the leeches and spike enemies.
For the next bell enemy, jump over its shockwave and then attack.
Afterwards, make sure you only burst on a safe launch pad.
Giant spike enemies will be coming towards you. To avoid them, you can hover to the side and then return. You can also carefully jump to the other side.
For the last section, carefully time your jumps in order to avoid the shockwaves and attack the bells.