This is the theme for Atomic Arena, the explosion/bomb theme level.
I made the music myself in beepbox. With scratch's compression, it made the tune sound worse so here you go if you want to listen to it uncompressed. https://beepbox.co/#8n31sbk0l00e0ft2Qm0a7g0fj07i0r1o3210T1v0L4u70q1d1f7y1z1C1c0A1F9B2V1Q1000Pdc74E018bT1v2L4u3bq1d5f7y1z7C0c2AcF8B4V6Q047cPa744E0000T5v0L4ua0q3d7f7y4z1C0c4h0HTP9Bx99sp99900T2v2L4u15q0d1f8y0z1C2w0b4zgid18Q000id18Q4zg000004zgid18Q000h4h4h4h4p22eFJvo4Qu304qrIYeCRZhd7TmhFH-QSnxoz8-bUSQzUEzOGyfzf6Xf6q9GeU5dHUaq_yz8Oae8p56hAksH8EOcyzyehhAV50kTE-3AdldQ-zi5d6sCkyz0cyz9OacT8EOsyzaOacD8EOIyw0