Helix Holdout

You are a nano-bot inside a human body trying to complete sequences of DNA, while enemies are trying to destroy it. You complete the DNA sequence by killing enemies with the matching NUCLEOTIDE TYPE: ADENINE(pink) matches THYMINE(green), and CYTOSINE(orange) matches GUANINE(orange). Killing enemies also grants you ATP, which you can use to buy turrets for further defending the DNA sequence.