welcome to our community mate
well i have to agree with tertiary, good first attempt, and if your goal is to create some dnb track i really have to suggest you to increase the bpm up to 170, at least.
otherwise this tempo is okay if you're going to create breakbeat or big beat songs (i recommend a tempo next to 135 bpm).
nice use of samples, that piano riff is pleasant. i look forward to hear more