A Little to the Left

You unlock this on the final level.

There will be three rows of different colours. Grey, Red & Yellow (The order of the colours might be unique to you).

For example: The first row that the cat jumped on for me was Grey, the second jump was Red, then Yellow. Just repeat whatever the colour scheme is until you reach the top.

The auto filled Tupperware probably won't match the colour you're supposed to be placing. Just ignore it, it won't affect it as long as the row you complete is the correct colour.

Tupperware Tower: You need to follow the tower pattern from the start - Gray, Yellow, Red. On each new level, the game will place some tupperware pieces on your tower, ignore them if they don't match the color you are working on and only place the next color in the sequence to make the next platform.

1:38:00 Tupperware Tower Replay - Rainbow to the Moon Guide

You unlock this on the final level.

There will be three rows of different colours, for me, it was Grey > Red > Yellow, your's could appear in a different order. Continue stacking in that colour pattern to unlock this. For example, my first row that the cat jumped on needed to be Grey, the second jump needed to be Red, then Yellow.

Note: the auto filled Tupperware probably won't match the colour you're supposed to be placing. Just ignore it, it won't affect the achievement.

Here's what I did:
(Not 100% sure if you need to carry on what starts or just follow your own pattern)

When the level loads you see the tower and its in a pattern, for me it when form the bottom up;
Blue -> Red -> Yellow -> Blue (first line to complete) ,
I just carried on this pattern, Building;
Blue -> Red -> Yellow -> Blue -> Red -> Yellow -> ect

You don't need to worry about the colours of the boxes that get added when the cat jumps up as long as you make the top level for correct colours in the pattern.

Missable Take a note of the order the coloured boxes drop to create the beginning of the stack, for me it started Blue/grey, then Red, then Yellow - I'm not sure if this random or always that order, I done this on two accounts and it was the same both times. I continued to build the stack in that order, so first row was blue, then red, then yellow, then back to blue and so on.

I also done the Unstable Stacker Achievement at the same time as this one - this one is done by only completing a row of the same colour when the boxes reach the very top of the screen - if you stick to the colour order above you'll get both achievements at same time.

This guide will help you through all puzzles and all achievements in the game.
Rainbow to the Moon and Unstable Stacker Achievement can be found at 2:16:55

A Little to the Left Walkthrough & All Solutions/Achievements