Need ears for 8 Bit / Punk project (bass)

[Wadokoha]

Hi, a few months ago I put a similar post and I got great advice from Timaeus222 for the drum sound of my project so now I'm back for the BASS!

Please listen to the song here:

https://soundcloud.com/wakodoha/sets/basstest/s-YGnPS

I'd like to have both the punch of punk bass and the recognizable triangle wave of 8bit music.

Something between this
https://www.youtube.com/watch?v=hB0-qopJyz4
and this
https://www.youtube.com/watch?v=UmUu4toKJCA
for example!

How can I improve the bass sound? Any frequency missing (I don't have studio monitors)?

(My project consists of playing punkish guitar and singing live but trying to have other instruments on backup tracks with a 8 bit (old videogame) sound.
Any comment will help me improve anyway since I'm a beginner, thank you!)

Edited November 16, 2016 by Wadokoha
updated tracks

[Wadokoha]

I updated the tracks in the link.
In my opinion one of the 2 tracks has a much better bass sound with fuller low frequencies now.

But I hope I can get some comments so that I'm sure I'm not doing it wrong please !