Looks cute, nice improvement from the previous one and it's not because of the colouring.
Probably looks good enough to pass, just need to work on technical stuff:
1. Payload not quite heavy enough. For you, lets try a 115t payload if you maintain that total mass. Oooor you could keep that current payload mass if you lighten the shuttle so that the total mass is like 900t. Or something similarly demanding.
1.1 Unclip the payload, stretch the cargo bay if you need to make it fit.
2. Your TWR is way too low for efficiency, increase it to 1.4 at a minimum maybe? The higher the better, in this case, and it'll make it easier to achieve the payload goals. You can increase TWR by having a first stage with more engines, or by making the whole rocket lighter.
3. You need vacuum engines on your shuttle, like valiants or frontier. 1 hawk at most, get the other part of the thrust from vacuum engines. This will help your efficiency and thus help reach your payload targets.
4. Those side boosters seem to run out of fuel too close to the time the first stage runs out of fuel. You can probably shrink them or give them extra engines so they run out faster.
An easy thing you can do to increase efficiency is remove most of the fuel that you land with, because it hurts your dry mass to carry it for the whole mission. That's fuel that could have been extra payload mass.
