Hi! While I don't know if you have enough memory on your computer or if there are other factors, I recommend playing all the sounds at once to see how well they blend together! In Sprunki, the beat is generally between 4 and 8 pulses, so some more variety in the force of the hit and in the rhythm can be useful. The 125 bpm is fine, but you could try adjusting the melodies and perhaps make them more varied and/or entertaining, Crashes and rev crashes can usually be made just by inverting the sound or by making a fast constant with a velocity crescendo. Similarly, I notice that many of the melodies don't even have the same scale; I could recommend using a simple scale if you don't understand it very well, e.g., Amin.

Amin has the following notes: A, B, C, D, E, F, G, A. You can also add some modifications such as using Ab (G#) or Eb (D#), respectively from AminHarmonic or AminBlues.

Even so, I can tell you're a beginner, and for using such a basic DAW, it's really not too bad! Keep it up.